From 33a9b1ca86e8a43792963aa24f9f152f5b91ca33 Mon Sep 17 00:00:00 2001
From: victorbrca <9310736+victorbrca@users.noreply.github.com>
Date: Wed, 13 Dec 2023 20:58:06 -0500
Subject: [PATCH] Updating html files

---
 .../pasted-image-20231213192056.png           | Bin 0 -> 56335 bytes
 docs/index.html                               |   9 +++--
 .../1-understand-and-use-essential-tools.html |   4 ++-
 ...nd-issue-commands-with-correct-syntax.html |   4 ++-
 .../1b-use-input-output-redirection.html      |   4 ++-
 ...d-regular-expressions-to-analyze-text.html |   4 ++-
 .../1d-access-remote-systems-using-ssh.html   |   4 ++-
 ...and-switch-users-in-multiuser-targets.html |   4 ++-
 ...s-files-using-tar-star-gzip-and-bzip2.html |   4 ++-
 .../1g-create-and-edit-text-files.html        |   4 ++-
 ...e-copy-and-move-files-and-directories.html |   4 ++-
 .../1i-create-hard-and-soft-links.html        |   4 ++-
 ...d-change-standard-ugo_rwx-permissions.html |   4 ++-
 ...-man-info-and-files-in-_usr_share_doc.html |   4 ++-
 .../10-manage-containers.html                 |   4 ++-
 ...ntainer-images-from-a-remote-registry.html |   4 ++-
 .../10b-inspect-container-images.html         |   4 ++-
 ...ng-commands-such-as-podman-and-skopeo.html |   4 ++-
 ...uild-a-container-from-a-containerfile.html |   6 ++--
 ...opping-and-listing-running-containers.html |   4 ++-
 .../10e-run-a-service-inside-a-container.html |   4 ++-
 ...rt-automatically-as-a-systemd-service.html |   4 ++-
 ...ach-persistent-storage-to-a-container.html |   4 ++-
 .../2-create-simple-shell-scripts.html        |   4 ++-
 ...xecute-code-(use-of_-if-test-[]-etc.).html |   4 ++-
 ....)-to-process-file-command-line-input.html |   4 ++-
 ...2c-process-script-inputs-($1-$2-etc.).html |   4 ++-
 ...put-of-shell-commands-within-a-script.html |   4 ++-
 ...8-processing-shell-command-exit-codes.html |   4 ++-
 .../3-operate-running-systems.html            |   4 ++-
 ...eboot-and-shut-down-a-system-normally.html |   4 ++-
 ...stems-into-different-targets-manually.html |   4 ++-
 ...s-in-order-to-gain-access-to-a-system.html |   4 ++-
 ...iority-with-renice-and-kill-processes.html |   4 ++-
 .../3e-adjust-process-scheduling.html         |   4 ++-
 .../3f-manage-tuning-profiles.html            |   4 ++-
 ...terpret-system-log-files-and-journals.html |   4 ++-
 .../3h-preserve-system-journals.html          |   4 ++-
 ...-check-the-status-of-network-services.html |   4 ++-
 ...curely-transfer-files-between-systems.html |   4 ++-
 .../4-configure-local-storage.html            |   4 ++-
 ...elete-partitions-on-mbr-and-gpt-disks.html |   4 ++-
 ...4b-create-and-remove-physical-volumes.html |   4 ++-
 ...ign-physical-volumes-to-volume-groups.html |   4 ++-
 .../4d-create-and-delete-logical-volumes.html |   4 ++-
 ...y-universally-unique-id-uuid-or-label.html |   4 ++-
 ...nd-swap-to-a-system-non-destructively.html |   4 ++-
 .../5-create-and-configure-file-systems.html  |   4 ++-
 ...nd-use-vfat-ext4-and-xfs-file-systems.html |   4 ++-
 ...nmount-network-file-systems-using-nfs.html |   4 ++-
 .../5c-rhel9-configure-autofs.html            |   4 ++-
 .../5d-extend-existing-logical-volumes.html   |   4 ++-
 ...set-gid-directories-for-collaboration.html |   4 ++-
 .../5e-rhel8-configure-disk-compression.html  |   4 ++-
 .../5f-rhel8-manage-layered-storage.html      |   4 ++-
 ...-and-correct-file-permission-problems.html |   4 ++-
 ...deploy-configure-and-maintain-systems.html |   4 ++-
 .../6a-schedule-tasks-using-at-and-cron.html  |   4 ++-
 ...rvices-to-start-automatically-at-boot.html |   4 ++-
 ...-into-a-specific-target-automatically.html |   4 ++-
 .../6d-configure-time-service-clients.html    |   4 ++-
 ...ository-or-from-the-local-file-system.html |   4 ++-
 ...hel8-work-with-package-module-streams.html |   4 ++-
 .../6g-modify-the-system-bootloader.html      |   4 ++-
 .../7-manage-basic-networking.html            |   4 ++-
 .../7a-configure-ipv4-and-ipv6-addresses.html |   4 ++-
 .../7b-configure-hostname-resolution.html     |   4 ++-
 ...rvices-to-start-automatically-at-boot.html |   4 ++-
 ...rk-access-using-firewall-cmd-firewall.html |   4 ++-
 .../8-manage-users-and-groups.html            |   4 ++-
 ...delete-and-modify-local-user-accounts.html |   4 ++-
 ...assword-aging-for-local-user-accounts.html |   4 ++-
 ...fy-local-groups-and-group-memberships.html |   4 ++-
 .../8d-configure-superuser-access.html        |   4 ++-
 .../9-manage-security/9-manage-security.html  |   4 ++-
 ...ewall-config-firewall-cmd-or-iptables.html |   4 ++-
 ...ate-and-use-file-access-control-lists.html |   4 ++-
 ...rhel9-manage-default-file-permissions.html |   4 ++-
 ...gure-key-based-authentication-for-ssh.html |   4 ++-
 ...cing-and-permissive-modes-for-selinux.html |   4 ++-
 ...tify-selinux-file-and-process-context.html |   4 ++-
 .../9ex-rhel9-manage-selinux-ports.html       |   4 ++-
 .../9f-restore-default-file-contexts.html     |   4 ++-
 ...ngs-to-modify-system-selinux-settings.html |   4 ++-
 ...ess-routine-selinux-policy-violations.html |   4 ++-
 docs/markdown/additional-resources.html       |   4 ++-
 docs/markdown/exam-format.html                |   4 ++-
 docs/markdown/objectives.html                 |   4 ++-
 docs/markdown/rules.html                      |   4 ++-
 docs/readme.html                              |   9 +++--
 docs/readme.html.bak                          |  33 ++++++++++++++++++
 91 files changed, 309 insertions(+), 92 deletions(-)
 create mode 100644 docs/attachments/pasted-image-20231213192056.png
 create mode 100644 docs/readme.html.bak

diff --git a/docs/attachments/pasted-image-20231213192056.png b/docs/attachments/pasted-image-20231213192056.png
new file mode 100644
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="RHCSA Community Study Guide" class="heading" id="RHCSA_Community_Study_Guide"><div class="heading-before"></div>RHCSA Community Study Guide<div class="heading-after">...</div></h1><div class="heading-children"><div><p>This repo serves as a community study guide for anyone that wants to study for the RHCSA exam. The idea is that anyone preparing for the exam can use the information here, as well as contribute (add, update, correct) to make it better. The aim is to have a free and Open Source study guide that is always up to date and with the best content.</p></div><div><p>Please adhere to the guidelines, and most importantly, Red Hat's NDA.</p></div><div><p><strong>Current Version:</strong> RHCSA v9 + v8 (<em>with container objectives</em>). Objectives which do not overlap are prefixed with RHCSA9 and RHCSA8 respectively.</p></div><div class="heading-wrapper"><h2 data-heading="How to use" class="heading" id="How_to_use"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>How to use<div class="heading-after">...</div></h2><div class="heading-children"><div><p>As a study guide it makes more sense to digest the content via your web browser. You can access it at the <a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a> page or via the official web site <a rel="noopener" class="external-link" href="https://rhcsa-study-guide.org" target="_blank">https://rhcsa-study-guide.org</a>.</p></div><div><p>If you want to edit the content, start by reviewing the <a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">rules</a>. After you can choose to edit the contents by following the proper procedure for contributing changes to a Git Hub repository (if you are not familiar with the Git Hub process you can find simple instructions <a data-tooltip-position="top" aria-label="https://kbroman.org/github_tutorial/pages/fork.html" rel="noopener" class="external-link" href="https://kbroman.org/github_tutorial/pages/fork.html" target="_blank">here</a>), or by creating a Git Hub <a data-tooltip-position="top" aria-label="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" target="_blank">issue</a>.</p></div><div class="heading-wrapper"><h3 data-heading="Rules and FAQ" class="heading" id="Rules_and_FAQ"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rules and FAQ<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Please review the rules before making any changes.</p></div><div><p><a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">Rules</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Study Content" class="heading" id="Study_Content"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Study Content<div class="heading-after">...</div></h2><div class="heading-children"><div><p>This is where you will be able to find various information about the exam, study guide, labs, study environments, etc.</p></div><div class="heading-wrapper"><h3 data-heading="Exam Format" class="heading" id="Exam_Format"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Exam Format<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The exam format for the current version of the exam.</p></div><div><p><a class="internal-link" data-href="markdown/Exam-Format.md" href="markdown/exam-format.html" target="_self" rel="noopener">Exam Format</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Objectives" class="heading" id="Objectives"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Objectives<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The current objectives for the exam (in enumerated list). This is where you can access the study guide's content.</p></div><div><p><a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Additional Resources" class="heading" id="Additional_Resources"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Additional Resources<div class="heading-after">...</div></h3><div class="heading-children"><div><p>This page will provide you additional resources that will greatly help with your study. Resources include instructional videos, environments, labs and much more.</p></div><div><p><a class="internal-link" data-href="markdown/Additional-Resources.md" href="markdown/additional-resources.html" target="_self" rel="noopener">Additional Resources</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Author" class="heading" id="Author"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Author<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Victor Mendonça</strong></p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9-Manage-security</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables-97b60.png"><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables-97b60</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9c-RHEL9-manage-default-file-permissions</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9c-rhel9-manage-default-file-permissions/default_umask_table.png"><span class="tree-item-title">default_umask_table</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9c-rhel9-manage-default-file-permissions/users_groups-umask_example.png"><span class="tree-item-title">users_groups-umask_example</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9-manage-security.html"><span class="tree-item-title">9-manage-security</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables.html"><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9b-rhel8-create-and-use-file-access-control-lists.html"><span class="tree-item-title">9b-RHEL8-create-and-use-file-access-control-lists</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9b-rhel9-manage-default-file-permissions.html"><span class="tree-item-title">9b-RHEL9-manage-default-file-permissions</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9c-configure-key-based-authentication-for-ssh.html"><span class="tree-item-title">9c-configure-key-based-authentication-for-ssh</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9d-set-enforcing-and-permissive-modes-for-selinux.html"><span class="tree-item-title">9d-set-enforcing-and-permissive-modes-for-selinux</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9e-list-and-identify-selinux-file-and-process-context.html"><span class="tree-item-title">9e-list-and-identify-selinux-file-and-process-context</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9ex-rhel9-manage-selinux-ports.html"><span class="tree-item-title">9ex-rhel9-manage-selinux-ports</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9f-restore-default-file-contexts.html"><span class="tree-item-title">9f-restore-default-file-contexts</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9g-use-boolean-settings-to-modify-system-selinux-settings.html"><span class="tree-item-title">9g-use-boolean-settings-to-modify-system-selinux-settings</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9h-diagnose-and-address-routine-selinux-policy-violations.html"><span class="tree-item-title">9h-diagnose-and-address-routine-selinux-policy-violations</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/additional-resources.html"><span class="tree-item-title">Additional-Resources</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/exam-format.html"><span class="tree-item-title">Exam-Format</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/objectives.html"><span class="tree-item-title">Objectives</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/rules.html"><span class="tree-item-title">Rules</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="readme.html"><span class="tree-item-title">README</span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="RHCSA Community Study Guide" class="heading" id="RHCSA_Community_Study_Guide"><div class="heading-before"></div>RHCSA Community Study Guide<div class="heading-after">...</div></h1><div class="heading-children"><div><p>This repo serves as a community study guide for anyone that wants to study for the RHCSA exam. The idea is that anyone preparing for the exam can use the information here, as well as contribute (add, update, correct) to make it better. The aim is to have a free and Open Source study guide that is always up to date and with the best content.</p></div><div><p><span alt="Pasted image 20231213192056.png" src="attachments/pasted-image-20231213192056.png" class="internal-embed media-embed image-embed is-loaded"><img alt="Pasted image 20231213192056.png" src="attachments/pasted-image-20231213192056.png"></span></p></div><div><p>Please adhere to the guidelines, and most importantly, <a data-tooltip-position="top" aria-label="https://www.redhat.com/en/about/red-hat-training-policies#terms" rel="noopener" class="external-link" href="https://www.redhat.com/en/about/red-hat-training-policies#terms" target="_blank">Red Hat's NDA</a>.</p></div><div><p><strong>Current Version:</strong> RHCSA v9 + v8 (<em>with container objectives</em>). Objectives which do not overlap are prefixed with RHCSA9 and RHCSA8 respectively.</p></div><div class="heading-wrapper"><h2 data-heading="How to use" class="heading" id="How_to_use"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>How to use<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The content is available in two places: the website (front end) <a rel="noopener" class="external-link" href="https://rhcsa-study-guide.org" target="_blank">https://rhcsa-study-guide.org</a>, and the repo (source files) <a rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide" target="_blank">https://github.com/victorbrca/rhcsa-study-guide</a> The website displays markdown files as html.</p></div><div><p>As a study guide it makes more sense to digest the content via your web browser. You can access it at the <a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a> page.</p></div><div><p>If you want to edit the content, start by reviewing the <a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">rules</a>. After you can choose to edit the contents by following the proper procedure for contributing changes to a Git Hub repository (if you are not familiar with the Git Hub process you can find simple instructions <a data-tooltip-position="top" aria-label="https://kbroman.org/github_tutorial/pages/fork.html" rel="noopener" class="external-link" href="https://kbroman.org/github_tutorial/pages/fork.html" target="_blank">here</a>), or by creating a Git Hub <a data-tooltip-position="top" aria-label="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" target="_blank">issue</a>.</p></div><div class="heading-wrapper"><h3 data-heading="Rules and FAQ" class="heading" id="Rules_and_FAQ"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rules and FAQ<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Please review the rules before making any changes.</p></div><div><p><a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">Rules</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Study Content" class="heading" id="Study_Content"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Study Content<div class="heading-after">...</div></h2><div class="heading-children"><div><p>This is where you will be able to find various information about the exam, study guide, labs, study environments, etc.</p></div><div class="heading-wrapper"><h3 data-heading="Exam Format" class="heading" id="Exam_Format"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Exam Format<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The exam format for the current version of the exam.</p></div><div><p><a class="internal-link" data-href="markdown/Exam-Format.md" href="markdown/exam-format.html" target="_self" rel="noopener">Exam Format</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Objectives" class="heading" id="Objectives"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Objectives<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The current objectives for the exam (in enumerated list). This is where you can access the study guide's content.</p></div><div><p><a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Additional Resources" class="heading" id="Additional_Resources"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Additional Resources<div class="heading-after">...</div></h3><div class="heading-children"><div><p>This page will provide you additional resources that will greatly help with your study. Resources include instructional videos, environments, labs and much more.</p></div><div><p><a class="internal-link" data-href="markdown/Additional-Resources.md" href="markdown/additional-resources.html" target="_self" rel="noopener">Additional Resources</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="About" class="heading" id="About"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>About<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Author" class="heading" id="Author"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Author<div class="heading-after">...</div></h3><div class="heading-children"><div><p><strong>Victor Mendonça</strong></p></div><div><ul>
 <li data-line="0">Site - <a data-tooltip-position="top" aria-label="https://victormendonca.com/" rel="noopener" class="external-link" href="https://victormendonca.com/" target="_blank">Victor Mendonça</a></li>
 <li data-line="1">GitHub - <a data-tooltip-position="top" aria-label="https://github.com/victorbrca" rel="noopener" class="external-link" href="https://github.com/victorbrca" target="_blank">victorbrca</a></li>
 <li data-line="2">Twitter - <a data-tooltip-position="top" aria-label="https://twitter.com/victorbrca" rel="noopener" class="external-link" href="https://twitter.com/victorbrca" target="_blank">@victorbrca</a></li>
-</ul></div><div class="mod-footer"></div></div></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#RHCSA_Community_Study_Guide"><span class="tree-item-title"><p>RHCSA Community Study Guide</p></span></a></div><div class="tree-item-children"><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#How_to_use"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>How to use</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Rules_and_FAQ"><span class="tree-item-title"><p>Rules and FAQ</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Study_Content"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>Study Content</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Exam_Format"><span class="tree-item-title"><p>Exam Format</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Objectives"><span class="tree-item-title"><p>Objectives</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Additional_Resources"><span class="tree-item-title"><p>Additional Resources</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Author"><span class="tree-item-title"><p>Author</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
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+</ul></div></div></div><div class="heading-wrapper"><h3 data-heading="Built With" class="heading" id="Built_With"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Built With<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
+<li data-line="0"><a data-tooltip-position="top" aria-label="https://obsidian.md/" rel="noopener" class="external-link" href="https://obsidian.md/" target="_blank">Obsidian - Sharpen your thinking</a></li>
+<li data-line="1"><a data-tooltip-position="top" aria-label="https://github.com/KosmosisDire/obsidian-webpage-export" rel="noopener" class="external-link" href="https://github.com/KosmosisDire/obsidian-webpage-export" target="_blank">GitHub - KosmosisDire/obsidian-webpage-export: Webpage HTML Export lets you export single files or whole vaults as HTML websites or documents. It is similar to publish, but you get direct access to the exported HTML.</a></li>
+</ul></div><div class="mod-footer"></div></div></div></div></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#RHCSA_Community_Study_Guide"><span class="tree-item-title"><p>RHCSA Community Study Guide</p></span></a></div><div class="tree-item-children"><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#How_to_use"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>How to use</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Rules_and_FAQ"><span class="tree-item-title"><p>Rules and FAQ</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Study_Content"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>Study Content</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Exam_Format"><span class="tree-item-title"><p>Exam Format</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Objectives"><span class="tree-item-title"><p>Objectives</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Additional_Resources"><span class="tree-item-title"><p>Additional Resources</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#About"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>About</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Author"><span class="tree-item-title"><p>Author</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Built_With"><span class="tree-item-title"><p>Built With</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html"><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1a-access-a-shell-prompt-and-issue-commands-with-correct-syntax.html"><span class="tree-item-title">1a-Access-a-shell-prompt-and-issue-commands-with-correct-syntax</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1b-use-input-output-redirection.html"><span class="tree-item-title">1b-Use-input-output-redirection</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1c-use-grep-and-regular-expressions-to-analyze-text.html"><span class="tree-item-title">1c-Use-grep-and-regular-expressions-to-analyze-text</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh.html"><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div 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href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html"><span class="tree-item-title">1g-Create-and-edit-text-files</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1h-create-delete-copy-and-move-files-and-directories.html"><span class="tree-item-title">1h-Create-delete-copy-and-move-files-and-directories</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html"><span class="tree-item-title">1i-Create-hard-and-soft-links</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div 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Understand and use essential tools" class="heading" id="1._Understand_and_use_essential_tools"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>1. Understand and use essential tools<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="1a-Access-a-shell-prompt-and-issue-commands-with-correct-syntax.md" href="markdown/1-understand-and-use-essential-tools/1a-access-a-shell-prompt-and-issue-commands-with-correct-syntax.html" target="_self" rel="noopener">1.a Access a shell prompt and issue commands with correct syntax</a></li>
 <li data-line="1"><a class="internal-link" data-href="1b-Use-input-output-redirection.md" href="markdown/1-understand-and-use-essential-tools/1b-use-input-output-redirection.html" target="_self" rel="noopener">1.b Use input-output redirection (&gt;, &gt;&gt;, |, 2&gt;, etc.)</a></li>
 <li data-line="2"><a class="internal-link" data-href="1c-Use-grep-and-regular-expressions-to-analyze-text.md" href="markdown/1-understand-and-use-essential-tools/1c-use-grep-and-regular-expressions-to-analyze-text.html" target="_self" rel="noopener">1.c Use grep and regular expressions to analyze text</a></li>
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class="heading-wrapper"><h1 data-heading="1.a Access a shell prompt and issue commands with correct syntax" class="heading" id="1.a_Access_a_shell_prompt_and_issue_commands_with_correct_syntax"><div class="heading-before"></div>1.a Access a shell prompt and issue commands with correct syntax<div class="heading-after">...</div></h1><div class="heading-children"><div><p>You should know:</p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png"><span class="tree-item-title">1d-Access-remote-systems-using-SSH-c3524</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1g-create-and-edit-text-files</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html"><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1a-access-a-shell-prompt-and-issue-commands-with-correct-syntax.html"><span class="tree-item-title">1a-Access-a-shell-prompt-and-issue-commands-with-correct-syntax</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1b-use-input-output-redirection.html"><span class="tree-item-title">1b-Use-input-output-redirection</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1c-use-grep-and-regular-expressions-to-analyze-text.html"><span class="tree-item-title">1c-Use-grep-and-regular-expressions-to-analyze-text</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh.html"><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div 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href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html"><span class="tree-item-title">1g-Create-and-edit-text-files</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1h-create-delete-copy-and-move-files-and-directories.html"><span class="tree-item-title">1h-Create-delete-copy-and-move-files-and-directories</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html"><span class="tree-item-title">1i-Create-hard-and-soft-links</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div 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xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10-manage-containers</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry</span></a></div><div class="tree-item-children" style="display: none;"><div 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class="tree-item-title">10f-configure-a-container-to-start-automatically-as-a-systemd-service</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10g-attach-persistent-storage-to-a-container.html"><span class="tree-item-title">10g-attach-persistent-storage-to-a-container</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">2-Create-simple-shell-scripts</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html"><span class="tree-item-title">2-Create-simple-shell-scripts</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/2-create-simple-shell-scripts/2a-conditionally-execute-code-(use-of_-if-test-[]-etc.).html"><span class="tree-item-title">2a-Conditionally-execute-code-(use-of_-if-test-[]-etc.)</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="1.a Access a shell prompt and issue commands with correct syntax" class="heading" id="1.a_Access_a_shell_prompt_and_issue_commands_with_correct_syntax"><div class="heading-before"></div>1.a Access a shell prompt and issue commands with correct syntax<div class="heading-after">...</div></h1><div class="heading-children"><div><p>You should know:</p></div><div><ul>
 <li data-line="0">How to open the terminal</li>
 <li data-line="1">Execute very basic commands (pwd, ls, cd, mv, man)</li>
 </ul></div><div><hr></div><div><p><a class="internal-link" data-href="1-Understand-and-use-essential-tools.md" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html" target="_self" rel="noopener">⬅️ Back</a></p></div><div class="mod-footer"></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#1.a_Access_a_shell_prompt_and_issue_commands_with_correct_syntax"><span class="tree-item-title"><p>1.a Access a shell prompt and issue commands with correct syntax</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></body></html>
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class="heading-wrapper"><h1 data-heading="1.b Use input-output redirection (>, >>, |, 2>, etc.)" class="heading" id="1.b_Use_input-output_redirection_(>,_>>,_|,_2>,_etc.)"><div class="heading-before"></div>1.b Use input-output redirection (&gt;, &gt;&gt;, |, 2&gt;, etc.)<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="stdin, stdout, stderr" class="heading" id="stdin,_stdout,_stderr"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>stdin, stdout, stderr<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Under normal circumstances every Linux program has three streams opened when it starts; one for input; one for output; and one for printing diagnostic or error messages. These are typically attached to the user's terminal (see man tty(4)) but might instead refer to files or other devices, depending on what the parent process chose to set up.</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="1.b Use input-output redirection (>, >>, |, 2>, etc.)" class="heading" id="1.b_Use_input-output_redirection_(>,_>>,_|,_2>,_etc.)"><div class="heading-before"></div>1.b Use input-output redirection (&gt;, &gt;&gt;, |, 2&gt;, etc.)<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="stdin, stdout, stderr" class="heading" id="stdin,_stdout,_stderr"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>stdin, stdout, stderr<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Under normal circumstances every Linux program has three streams opened when it starts; one for input; one for output; and one for printing diagnostic or error messages. These are typically attached to the user's terminal (see man tty(4)) but might instead refer to files or other devices, depending on what the parent process chose to set up.</p></div><div><ul>
 <li data-line="0">stdin (0) - Keyboard</li>
 <li data-line="1">stdout (1) - Screen</li>
 <li data-line="2">stderr (2) - Device reserved for error output</li>
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data-heading="1.c Use grep and regular expressions to analyze text" class="heading" id="1.c_Use_grep_and_regular_expressions_to_analyze_text"><div class="heading-before"></div>1.c Use grep and regular expressions to analyze text<div class="heading-after">...</div></h1><div class="heading-children"><div style="overflow-x: auto;"><table>
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class="heading-wrapper"><h1 data-heading="1.d Access remote systems using SSH" class="heading" id="1.d_Access_remote_systems_using_SSH"><div class="heading-before"></div>1.d Access remote systems using SSH<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="The SSH protocol" class="heading" id="The_SSH_protocol"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>The SSH protocol<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The SSH protocol uses encryption to secure the connection between a client and a server. All user authentication, commands, output, and file transfers are encrypted to protect against attacks in the network.</p></div><div><p></p><div src="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png"></div><p></p></div><div><p>The new protocol replaced several legacy tools and protocols, including telnet, ftp, FTP/S, rlogin, rsh, and rcp.</p></div><div><p><strong>Old Technologies that the SSH stack replaces</strong></p></div><div><ul>
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data-heading="1.d Access remote systems using SSH" class="heading" id="1.d_Access_remote_systems_using_SSH"><div class="heading-before"></div>1.d Access remote systems using SSH<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="The SSH protocol" class="heading" id="The_SSH_protocol"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>The SSH protocol<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The SSH protocol uses encryption to secure the connection between a client and a server. All user authentication, commands, output, and file transfers are encrypted to protect against attacks in the network.</p></div><div><p></p><div src="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png"></div><p></p></div><div><p>The new protocol replaced several legacy tools and protocols, including telnet, ftp, FTP/S, rlogin, rsh, and rcp.</p></div><div><p><strong>Old Technologies that the SSH stack replaces</strong></p></div><div><ul>
 <li data-line="0">Telnet -&gt; SSH</li>
 <li data-line="1">RCP -&gt; SCP</li>
 <li data-line="2">FTP -&gt; SFTP</li>
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class="heading-wrapper"><h1 data-heading="1.e Log in and switch users in multiuser targets" class="heading" id="1.e_Log_in_and_switch_users_in_multiuser_targets"><div class="heading-before"></div>1.e Log in and switch users in multiuser targets<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Understanding Sell Types" class="heading" id="Understanding_Sell_Types"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Understanding Sell Types<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Login Shells</strong></p></div><div><p>A login shell (also an interactive shell) is the first process that executes under your user ID when you log in for an interactive session.</p></div><div><p>Bash runs the following scripts on login:</p></div><div><ul>
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data-heading="1.e Log in and switch users in multiuser targets" class="heading" id="1.e_Log_in_and_switch_users_in_multiuser_targets"><div class="heading-before"></div>1.e Log in and switch users in multiuser targets<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Understanding Sell Types" class="heading" id="Understanding_Sell_Types"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Understanding Sell Types<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Login Shells</strong></p></div><div><p>A login shell (also an interactive shell) is the first process that executes under your user ID when you log in for an interactive session.</p></div><div><p>Bash runs the following scripts on login:</p></div><div><ul>
 <li data-line="0">/etc/profile</li>
 <li data-line="1">The first found of ~/.bash_profile, ~/.bash_login, ~/.profile</li>
 </ul></div><div><p><strong>Interactive Shells</strong></p></div><div><p>An interactive shell reads commands from user input on a tty. Among other things, such a shell reads startup files on activation, displays a prompt, and enables job control by default. The user can interact with the shell. On entering an interactive terminal, Bash also executes:</p></div><div><ul>
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data-heading="1.f Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2" class="heading" id="1.f_Archive,_compress,_unpack,_and_uncompress_files_using_tar,_star,_gzip,_and_bzip2"><div class="heading-before"></div>1.f Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><ul>
 <li data-line="0">Compression - encoding information in fewer bits</li>
 <li data-line="1">Archive - a file that is a collection of other files that can be managed easier (sorted, moving, copying, etc...)</li>
 </ul></div></div></div><div class="heading-wrapper"><h2 data-heading="Archive" class="heading" id="Archive"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Archive<div class="heading-after">...</div></h2><div class="heading-children"></div></div><div class="heading-wrapper"><h2 data-heading="tar" class="heading" id="tar"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>tar<div class="heading-after">...</div></h2><div class="heading-children"><div><p>'tar' stands for "TApe ARchive".</p></div><div class="heading-wrapper"><h3 data-heading="Usages" class="heading" id="Usages"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Usages<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Create a tar archive</p></div><div><pre><code>tax -cvf [archive].tar [file(s)|folder]
diff --git a/docs/markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html b/docs/markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html
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@@ -23,7 +25,7 @@
 
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="1.g Create and edit text files" class="heading" id="1.g_Create_and_edit_text_files"><div class="heading-before"></div>1.g Create and edit text files<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Editing files" class="heading" id="Editing_files"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Editing files<div class="heading-after">...</div></h2><div class="heading-children"><div><p>You should be familiar with at least one of the editors below:</p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1g-create-and-edit-text-files</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html"><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1a-access-a-shell-prompt-and-issue-commands-with-correct-syntax.html"><span class="tree-item-title">1a-Access-a-shell-prompt-and-issue-commands-with-correct-syntax</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" 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href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html"><span class="tree-item-title">1g-Create-and-edit-text-files</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1h-create-delete-copy-and-move-files-and-directories.html"><span class="tree-item-title">1h-Create-delete-copy-and-move-files-and-directories</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html"><span class="tree-item-title">1i-Create-hard-and-soft-links</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1j-list-set-and-change-standard-ugo_rwx-permissions.html"><span class="tree-item-title">1j-List-set-and-change-standard-ugo_rwx-permissions</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1k-locate-read-and-use-system-documentation-including-man-info-and-files-in-_usr_share_doc.html"><span class="tree-item-title">1k-Locate-read-and-use-system-documentation-including-man-info-and-files-in-_usr_share_doc</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10-manage-containers</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry</span></a></div><div class="tree-item-children" style="display: none;"><div 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class="internal-link tree-item-link" href="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry/10a-find-and-retrieve-container-images-from-a-remote-registry-d8ca7.png"><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry-d8ca7</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10b-inspect-container-images</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-18965.png"><span class="tree-item-title">10b-inspect-container-images-18965</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-c29b2.png"><span class="tree-item-title">10b-inspect-container-images-c29b2</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-ff33e.png"><span class="tree-item-title">10b-inspect-container-images-ff33e</span></a></div><div 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class="tree-item-title">10f-configure-a-container-to-start-automatically-as-a-systemd-service</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10g-attach-persistent-storage-to-a-container.html"><span class="tree-item-title">10g-attach-persistent-storage-to-a-container</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="1.g Create and edit text files" class="heading" id="1.g_Create_and_edit_text_files"><div class="heading-before"></div>1.g Create and edit text files<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Editing files" class="heading" id="Editing_files"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Editing files<div class="heading-after">...</div></h2><div class="heading-children"><div><p>You should be familiar with at least one of the editors below:</p></div><div><ul>
 <li data-line="0">vi (1p)              - screen-oriented (visual) display editor</li>
 <li data-line="1">vim (1)              - Vi IMproved, a programmer's text editor</li>
 <li data-line="2">nano (1)             - Nano's ANOther editor, an enhanced free Pico clone</li>
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class="heading-wrapper"><h1 data-heading="1.h Create, delete, copy, and move files and directories" class="heading" id="1.h_Create,_delete,_copy,_and_move_files_and_directories"><div class="heading-before"></div>1.h Create, delete, copy, and move files and directories<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>You should review the following commands:</strong></p></div><div><ul>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="1.h Create, delete, copy, and move files and directories" class="heading" id="1.h_Create,_delete,_copy,_and_move_files_and_directories"><div class="heading-before"></div>1.h Create, delete, copy, and move files and directories<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>You should review the following commands:</strong></p></div><div><ul>
 <li data-line="0">ls (1)               - list directory contents</li>
 <li data-line="1">touch (1)            - change file timestamps</li>
 <li data-line="2">cp (1)               - copy files and directories</li>
diff --git a/docs/markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html b/docs/markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html
index 7964ce1..89d373e 100644
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+++ b/docs/markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html
@@ -1,6 +1,8 @@
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+
+
 			
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 		<base href="../../">
@@ -23,7 +25,7 @@
 
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class="heading-wrapper"><h1 data-heading="1.i Create hard and soft links" class="heading" id="1.i_Create_hard_and_soft_links"><div class="heading-before"></div>1.i Create hard and soft links<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
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mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png"><span class="tree-item-title">1d-Access-remote-systems-using-SSH-c3524</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a 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href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html"><span class="tree-item-title">1g-Create-and-edit-text-files</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1h-create-delete-copy-and-move-files-and-directories.html"><span class="tree-item-title">1h-Create-delete-copy-and-move-files-and-directories</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html"><span class="tree-item-title">1i-Create-hard-and-soft-links</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div 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class="tree-item-title">10f-configure-a-container-to-start-automatically-as-a-systemd-service</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10g-attach-persistent-storage-to-a-container.html"><span class="tree-item-title">10g-attach-persistent-storage-to-a-container</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">2-Create-simple-shell-scripts</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html"><span class="tree-item-title">2-Create-simple-shell-scripts</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/2-create-simple-shell-scripts/2a-conditionally-execute-code-(use-of_-if-test-[]-etc.).html"><span class="tree-item-title">2a-Conditionally-execute-code-(use-of_-if-test-[]-etc.)</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/2-create-simple-shell-scripts/2e-rhel8-processing-shell-command-exit-codes.html"><span class="tree-item-title">2e-RHEL8-Processing-shell-command-exit-codes</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">3-Operate-running-systems</span></a></div><div class="tree-item-children" style="display: none;"><div 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="1.i Create hard and soft links" class="heading" id="1.i_Create_hard_and_soft_links"><div class="heading-before"></div>1.i Create hard and soft links<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">ln (1)               - make links between files</li>
 <li data-line="1">unlink (1)           - call the unlink function to remove the specified file</li>
 </ul></div><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Hardlink" class="heading" id="Hardlink"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Hardlink<div class="heading-after">...</div></h3><div class="heading-children"><div><p>You can think a hard link as an additional name for an existing file. Hard links are associating two or more file names with the same inode . You can create one or more hard links for a single file. Hard links cannot be created for directories and files on a different filesystem or partition.</p></div></div></div><div class="heading-wrapper"><h3 data-heading="Softlink/Symlinks" class="heading" id="Softlink/Symlinks"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Softlink/Symlinks<div class="heading-after">...</div></h3><div class="heading-children"><div><p>A soft link is something like a shortcut in Windows. It is an indirect pointer to a file or directory. Unlike a hard link, a symbolic link can point to a file or a directory on a different filesystem or partition.</p></div></div></div><div class="heading-wrapper"><h3 data-heading="Hardlink vs softlink" class="heading" id="Hardlink_vs_softlink"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Hardlink vs softlink<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
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@@ -23,7 +25,7 @@
 
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class="heading-wrapper"><h1 data-heading="1.j List, set, and change standard ugo/rwx permissions" class="heading" id="1.j_List,_set,_and_change_standard_ugo/rwx_permissions"><div class="heading-before"></div>1.j List, set, and change standard ugo/rwx permissions<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Permission in Linux" class="heading" id="Permission_in_Linux"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Permission in Linux<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Linux divides the file permissions into 3 groups with read, write and execute denoted by r,w, and x respectively.</p></div><div><p>Each file and directory has three user based permission groups:</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="1.j List, set, and change standard ugo/rwx permissions" class="heading" id="1.j_List,_set,_and_change_standard_ugo/rwx_permissions"><div class="heading-before"></div>1.j List, set, and change standard ugo/rwx permissions<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Permission in Linux" class="heading" id="Permission_in_Linux"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Permission in Linux<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Linux divides the file permissions into 3 groups with read, write and execute denoted by r,w, and x respectively.</p></div><div><p>Each file and directory has three user based permission groups:</p></div><div><ul>
 <li data-line="0"><strong>user</strong> – The Owner permissions apply only the owner of the file or directory, they will not impact the actions of other users.</li>
 <li data-line="1"><strong>group</strong> – The Group permissions apply only to the group that has been assigned to the file or directory, they will not effect the actions of other users.</li>
 <li data-line="2"><strong>others</strong> – The All Users permissions apply to all other users on the system, this is the permission group that you want to watch the most.</li>
diff --git a/docs/markdown/1-understand-and-use-essential-tools/1k-locate-read-and-use-system-documentation-including-man-info-and-files-in-_usr_share_doc.html b/docs/markdown/1-understand-and-use-essential-tools/1k-locate-read-and-use-system-documentation-including-man-info-and-files-in-_usr_share_doc.html
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class="heading-wrapper"><h1 data-heading="1.k Locate, read, and use system documentation including man, info, and files in /usr/share/doc" class="heading" id="1.k_Locate,_read,_and_use_system_documentation_including_man,_info,_and_files_in_/usr/share/doc"><div class="heading-before"></div>1.k Locate, read, and use system documentation including man, info, and files in /usr/share/doc<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Using System Documentation" class="heading" id="Using_System_Documentation"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Using System Documentation<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Make sure you are familiar with the following content:</p></div><div><ul>
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class="tree-item-title">10b-inspect-container-images</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10c-perform-container-management-using-commands-such-as-podman-and-skopeo.html"><span class="tree-item-title">10c-perform-container-management-using-commands-such-as-podman-and-skopeo</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10cx-rhel9-build-a-container-from-a-containerfile.html"><span class="tree-item-title">10cx-RHEL9-build-a-container-from-a-containerfile</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="1.k Locate, read, and use system documentation including man, info, and files in /usr/share/doc" class="heading" id="1.k_Locate,_read,_and_use_system_documentation_including_man,_info,_and_files_in_/usr/share/doc"><div class="heading-before"></div>1.k Locate, read, and use system documentation including man, info, and files in /usr/share/doc<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Using System Documentation" class="heading" id="Using_System_Documentation"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Using System Documentation<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Make sure you are familiar with the following content:</p></div><div><ul>
 <li data-line="0">help flags (-h, --help, -?)</li>
 <li data-line="1">man
 <ul>
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data-heading="10. Manage containers" class="heading" id="10._Manage_containers"><div class="heading-before"></div>10. Manage containers<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="10a-find-and-retrieve-container-images-from-a-remote-registry.md" href="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry.html" target="_self" rel="noopener">10.a Find and retrieve container images from a remote registry</a></li>
 <li data-line="1"><a class="internal-link" data-href="10b-inspect-container-images.md" href="markdown/10-manage-containers/10b-inspect-container-images.html" target="_self" rel="noopener">10.b Inspect container images</a></li>
 <li data-line="2"><a class="internal-link" data-href="10c-perform-container-management-using-commands-such-as-podman-and-skopeo.md" href="markdown/10-manage-containers/10c-perform-container-management-using-commands-such-as-podman-and-skopeo.html" target="_self" rel="noopener">10.c Perform container management using commands such as podman and skopeo</a></li>
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class="heading-wrapper"><h1 data-heading="10.a Find and retrieve container images from a remote registry" class="heading" id="10.a_Find_and_retrieve_container_images_from_a_remote_registry"><div class="heading-before"></div>10.a Find and retrieve container images from a remote registry<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="What is a Container" class="heading" id="What_is_a_Container"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>What is a Container<div class="heading-after">...</div></h2><div class="heading-children"><div><p>A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another.  </p></div><div><p>There are several competing Container Image formats (Docker, Appc, LXD), but the industry is moving forward with a standard governed under the Open Container Initiative – sometimes referred to simply as Open Containers or the OCI.</p></div><div class="heading-wrapper"><h3 data-heading="Image vs Container" class="heading" id="Image_vs_Container"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Image vs Container<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Images can exist without containers, whereas a container needs to run an image to exist. Therefore, containers are dependent on images and use them to construct a run-time environment and run an application.</p></div></div></div><div class="heading-wrapper"><h3 data-heading="Docker" class="heading" id="Docker"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Docker<div class="heading-after">...</div></h3><div class="heading-children"><div><blockquote>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="10.a Find and retrieve container images from a remote registry" class="heading" id="10.a_Find_and_retrieve_container_images_from_a_remote_registry"><div class="heading-before"></div>10.a Find and retrieve container images from a remote registry<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="What is a Container" class="heading" id="What_is_a_Container"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>What is a Container<div class="heading-after">...</div></h2><div class="heading-children"><div><p>A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another.  </p></div><div><p>There are several competing Container Image formats (Docker, Appc, LXD), but the industry is moving forward with a standard governed under the Open Container Initiative – sometimes referred to simply as Open Containers or the OCI.</p></div><div class="heading-wrapper"><h3 data-heading="Image vs Container" class="heading" id="Image_vs_Container"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Image vs Container<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Images can exist without containers, whereas a container needs to run an image to exist. Therefore, containers are dependent on images and use them to construct a run-time environment and run an application.</p></div></div></div><div class="heading-wrapper"><h3 data-heading="Docker" class="heading" id="Docker"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Docker<div class="heading-after">...</div></h3><div class="heading-children"><div><blockquote>
 <p>Docker is a containerization stage where we can bundle our application with its libraries and conditions inside that container. Docker Container is a to some degree like a virtual machine.</p>
 </blockquote></div><div><p>A Docker container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries and settings.</p></div><div><p></p><div src="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry/10a-find-and-retrieve-container-images-from-a-remote-registry-3f088.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry/10a-find-and-retrieve-container-images-from-a-remote-registry-3f088.png"></div><p></p></div><div><p>Container images become containers at runtime and in the case of Docker containers - images become containers when they run on Docker Engine. Available for both Linux and Windows-based applications, containerized software will always run the same, regardless of the infrastructure. Containers isolate software from its environment and ensure that it works uniformly despite differences for instance between development and staging.</p></div><div class="heading-wrapper"><h4 data-heading="Docker Engine" class="heading" id="Docker_Engine"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Docker Engine<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Docker Engine is the industry’s de facto container runtime that runs on various Linux (CentOS, Debian, Fedora, Oracle Linux, RHEL, SUSE, and Ubuntu) and Windows Server operating systems.  </p></div></div></div></div></div><div class="heading-wrapper"><h3 data-heading="Podman" class="heading" id="Podman"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Podman<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Podman is a daemon-less container engine for developing, managing, and running OCI Containers on your Linux System. Containers can either be run as root or in rootless mode.</p></div><div><p>Podman is a daemonless, open source, Linux native tool designed to make it easy to find, run, build, share and deploy applications using Open Containers Initiative (OCI) Containers and Container Images. Podman provides a command line interface (CLI) familiar to anyone who has used the Docker Container Engine. Most users can simply alias Docker to Podman (alias docker=podman) without any problems.</p></div><div><p>Similar to other common Container Engines (Docker, CRI-O, containerd), Podman relies on an OCI compliant Container Runtime (runc, crun, runv, etc) to interface with the operating system and create the running containers. This makes the running containers created by Podman nearly indistinguishable from those created by any other common container engine.</p></div></div></div><div class="heading-wrapper"><h3 data-heading="Docker vs Podman" class="heading" id="Docker_vs_Podman"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Docker vs Podman<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
 <li data-line="0"><strong>Podman</strong>  
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="10.b Inspect container images" class="heading" id="10.b_Inspect_container_images"><div class="heading-before"></div>10.b Inspect container images<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Inspecting Containers" class="heading" id="Inspecting_Containers"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Inspecting Containers<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Inspecting containers is an important part of working with containers as it allows to understand a little more about how a container was built, it's capabilities and much more.  </p></div><div><p>For example, for the 'rhel8/mariadb-103' we can see the:</p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1g-create-and-edit-text-files</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html"><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1a-access-a-shell-prompt-and-issue-commands-with-correct-syntax.html"><span class="tree-item-title">1a-Access-a-shell-prompt-and-issue-commands-with-correct-syntax</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" 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href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html"><span class="tree-item-title">1g-Create-and-edit-text-files</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1h-create-delete-copy-and-move-files-and-directories.html"><span class="tree-item-title">1h-Create-delete-copy-and-move-files-and-directories</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html"><span class="tree-item-title">1i-Create-hard-and-soft-links</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1j-list-set-and-change-standard-ugo_rwx-permissions.html"><span class="tree-item-title">1j-List-set-and-change-standard-ugo_rwx-permissions</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1k-locate-read-and-use-system-documentation-including-man-info-and-files-in-_usr_share_doc.html"><span class="tree-item-title">1k-Locate-read-and-use-system-documentation-including-man-info-and-files-in-_usr_share_doc</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg 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class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry/10a-find-and-retrieve-container-images-from-a-remote-registry-3f088.png"><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry-3f088</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry/10a-find-and-retrieve-container-images-from-a-remote-registry-9f986.png"><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry-9f986</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry/10a-find-and-retrieve-container-images-from-a-remote-registry-d8ca7.png"><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry-d8ca7</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10b-inspect-container-images</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-18965.png"><span class="tree-item-title">10b-inspect-container-images-18965</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-c29b2.png"><span class="tree-item-title">10b-inspect-container-images-c29b2</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-ff33e.png"><span class="tree-item-title">10b-inspect-container-images-ff33e</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10-manage-containers.html"><span class="tree-item-title">10-manage-containers</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10a-find-and-retrieve-container-images-from-a-remote-registry.html"><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images.html"><span class="tree-item-title">10b-inspect-container-images</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10c-perform-container-management-using-commands-such-as-podman-and-skopeo.html"><span class="tree-item-title">10c-perform-container-management-using-commands-such-as-podman-and-skopeo</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10cx-rhel9-build-a-container-from-a-containerfile.html"><span class="tree-item-title">10cx-RHEL9-build-a-container-from-a-containerfile</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10d-perform-basic-container-management-such-as-running-starting-stopping-and-listing-running-containers.html"><span class="tree-item-title">10d-perform-basic-container-management-such-as-running-starting-stopping-and-listing-running-containers</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10e-run-a-service-inside-a-container.html"><span class="tree-item-title">10e-run-a-service-inside-a-container</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10f-configure-a-container-to-start-automatically-as-a-systemd-service.html"><span class="tree-item-title">10f-configure-a-container-to-start-automatically-as-a-systemd-service</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10g-attach-persistent-storage-to-a-container.html"><span class="tree-item-title">10g-attach-persistent-storage-to-a-container</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">2-Create-simple-shell-scripts</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html"><span class="tree-item-title">2-Create-simple-shell-scripts</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/2-create-simple-shell-scripts/2a-conditionally-execute-code-(use-of_-if-test-[]-etc.).html"><span class="tree-item-title">2a-Conditionally-execute-code-(use-of_-if-test-[]-etc.)</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="10.b Inspect container images" class="heading" id="10.b_Inspect_container_images"><div class="heading-before"></div>10.b Inspect container images<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Inspecting Containers" class="heading" id="Inspecting_Containers"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Inspecting Containers<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Inspecting containers is an important part of working with containers as it allows to understand a little more about how a container was built, it's capabilities and much more.  </p></div><div><p>For example, for the 'rhel8/mariadb-103' we can see the:</p></div><div><ul>
 <li data-line="0">Architecture
 <ul>
 <li data-line="1">"x86_64"</li>
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class="heading-wrapper"><h1 data-heading="10.c Perform container management using commands such as podman and skopeo" class="heading" id="10.c_Perform_container_management_using_commands_such_as_podman_and_skopeo"><div class="heading-before"></div>10.c Perform container management using commands such as podman and skopeo<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Login to a Container Registry" class="heading" id="Login_to_a_Container_Registry"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Login to a Container Registry<div class="heading-after">...</div></h3><div class="heading-children"><div><p>You can use <code>podman login [registry]</code> and <code>skopeo login [registry]</code> to login to registries.  </p></div><div><p><strong>📌 EXAM TIP:</strong> <em>If you need to execute <code>podman {login,inspect,search}</code> and <code>skope [login,inspect]</code> as another user, make sure to use SSH (and not <code>sudo</code> or <code>su</code>) otherwise it will not work.</em></p></div></div></div><div class="heading-wrapper"><h3 data-heading="List ports mappings for containers" class="heading" id="List_ports_mappings_for_containers"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>List ports mappings for containers<div class="heading-after">...</div></h3><div class="heading-children"><div><p>You can list ports for a running container</p></div><div><pre><code># podman port [container]
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data-heading="10.c Perform container management using commands such as podman and skopeo" class="heading" id="10.c_Perform_container_management_using_commands_such_as_podman_and_skopeo"><div class="heading-before"></div>10.c Perform container management using commands such as podman and skopeo<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Login to a Container Registry" class="heading" id="Login_to_a_Container_Registry"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Login to a Container Registry<div class="heading-after">...</div></h3><div class="heading-children"><div><p>You can use <code>podman login [registry]</code> and <code>skopeo login [registry]</code> to login to registries.  </p></div><div><p><strong>📌 EXAM TIP:</strong> <em>If you need to execute <code>podman {login,inspect,search}</code> and <code>skope [login,inspect]</code> as another user, make sure to use SSH (and not <code>sudo</code> or <code>su</code>) otherwise it will not work.</em></p></div></div></div><div class="heading-wrapper"><h3 data-heading="List ports mappings for containers" class="heading" id="List_ports_mappings_for_containers"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>List ports mappings for containers<div class="heading-after">...</div></h3><div class="heading-children"><div><p>You can list ports for a running container</p></div><div><pre><code># podman port [container]
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>Or for all running containers</p></div><div><pre><code># podman port -a
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>Example:</p></div><div><pre><code>$ podman port -a
 3da879abc394    8080/tcp -&gt; 0.0.0.0:8000
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class="heading-wrapper"><h1 data-heading="10c. 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="10c. Build a container from a Containerfile" class="heading" id="10c._Build_a_container_from_a_Containerfile"><div class="heading-before"></div>10c. Build a container from a Containerfile<div class="heading-after">...</div></h1><div class="heading-children"><div><p><em>This topic includes:</em></p></div><div><ul>
 <li data-line="0">Building a pre-written container</li>
 <li data-line="1">Writing a simple Containerfile</li>
 <li data-line="2">Buildah explanation</li>
 </ul></div><div><p><em>Commands:</em></p></div><div><ul>
 <li data-line="0">podman build</li>
 <li data-line="1">podman run</li>
-</ul></div><div class="heading-wrapper"><h2 data-heading="Build commands" class="heading" id="Build_commands"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Build commands<div class="heading-after">...</div></h2><div class="heading-children"><div><p>To build a container from an existing Containerfile, all that is needed is specifying the directory and a tag, <code>-t</code>, to name the build by. In the following example, we assume the container runs a server on port 80.</p></div><div class="code-styler-pre-parent"><pre class="code-styler-pre" defaultfold="false"><div class="code-styler-header-container-hidden"></div><code><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text">[user@localhost ~]$ ls </div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text"># myServer</div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text">[user@localhost ~]$ podman build -t serverImage myServer/</div></div><div class="code-styler-line"><div class="code-styler-line-number">5</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">6</div><div class="code-styler-line-text">[user@localhost ~]$ podman images</div></div><div class="code-styler-line"><div class="code-styler-line-number">7</div><div class="code-styler-line-text"># REPOSITORY                                   TAG         IMAGE ID      CREATED         SIZE</div></div><div class="code-styler-line"><div class="code-styler-line-number">8</div><div class="code-styler-line-text"># localhost/serverImag                         latest      a463eb6e3e4f  19 minutes ago  249 MB</div></div></code><button class="copy-code-button">Copy</button></pre></div><div><p>This image can then be run through a <code>docker run</code> command. It is advisable to specify a name, though the same name cannot be used twice.</p></div><div class="code-styler-pre-parent"><pre class="code-styler-pre" defaultfold="false"><div class="code-styler-header-container-hidden"></div><code><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text">[user@localhost ~]$ podman run -d -p 8080:80 --name serverInstance serverImage:latest</div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text">[user@localhost ~]$ curl localhost:8080</div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text"># &lt;h1&gt;Server response&lt;/h1&gt;</div></div></code><button class="copy-code-button">Copy</button></pre></div></div></div><div class="heading-wrapper"><h2 data-heading="Writing a Containerfile" class="heading" id="Writing_a_Containerfile"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Writing a Containerfile<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Red Hat provides a <a data-tooltip-position="top" aria-label="https://access.redhat.com/articles/4238681" rel="noopener" class="external-link" href="https://access.redhat.com/articles/4238681" target="_blank"><em>universal basic image</em></a> to base your containers from. It is recommended to use it for any container-related activities within RHEL and RHCSA.</p></div><div><p>Below is a simple containerfile which pulls a standard UBI and installs a httpd server to it. </p></div><div><p>Environment:</p></div><div class="code-styler-pre-parent"><pre class="code-styler-pre" defaultfold="false"><div class="code-styler-header-container-hidden"></div><code><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text">ls ~/myServer/</div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text">index.html  Containerfile</div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text">cat ~/myServer/index.html</div></div><div class="code-styler-line"><div class="code-styler-line-number">5</div><div class="code-styler-line-text"># Hello World</div></div></code><button class="copy-code-button">Copy</button></pre></div><div class="code-styler-pre-parent"><pre class="language-dockerfile code-styler-pre" tabindex="0" defaultfold="false"><div class="code-styler-header-container"><div><img class="code-styler-icon" src="blob:app://obsidian.md/85342726-be21-400f-998b-c93a8b4c14a7"></div><div class="code-styler-header-language-tag">Docker</div><div class="code-styler-header-text"></div></div><code class="language-dockerfile is-loaded"><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">FROM</span> registry.access.redhat.com/ubi9/ubi</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">RUN</span> dnf install -y httpd</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">EXPOSE</span> 80</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">5</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">WORKDIR</span> /var/www/html</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">6</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">COPY</span> index.html /var/www/html/index.html</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">7</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">8</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">CMD</span> httpd -D FOREGROUND</span></div></div></code><button class="copy-code-button">Copy</button></pre></div><div><p>You can now build and run the Containerfile as shown above.</p></div><div><p><strong>📝 NOTE:</strong> <em>A Containerfile is a configuration file that automates the steps of creating a container image. It is similar to a Makefile. This flexibility allows developers to build different containers which achieve the same thing. For instance, instead of copying index.html to the workdir it could be printed directly; or the httpd execution command could be written in a different way. Whichever syntax you find most comfortable is likely fine to use.</em></p></div></div></div><div class="heading-wrapper"><h2 data-heading="A word on Buildah" class="heading" id="A_word_on_Buildah"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>A word on Buildah<div class="heading-after">...</div></h2><div class="heading-children"><div><p><code>Buildah</code> is a utility which pre-dates Docker and Containerfiles. It works on a lower-level than <code>podman build</code>, providing finer-grained control. You can experiment with it, but for the levels of detail needed in the RHCSA learning podman and Containerfiles is likely enough. </p></div><div><p>An interesting apsect of Buildah is that it can interactively build a container line-by-line - allowing for trial and error. In production, however, these buildah command are written into a shell script and look similar to a Containerfile anyway. A section of <a data-tooltip-position="top" aria-label="https://developers.redhat.com/blog/2019/02/21/podman-and-buildah-for-docker-users#" rel="noopener" class="external-link" href="https://developers.redhat.com/blog/2019/02/21/podman-and-buildah-for-docker-users#" target="_blank">this article</a> is dedicated to Buildah and explains it well.</p></div><div class="mod-footer"></div></div></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#10c._Build_a_container_from_a_Containerfile"><span class="tree-item-title"><p>10c. Build a container from a Containerfile</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Build_commands"><span class="tree-item-title"><p>Build commands</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Writing_a_Containerfile"><span class="tree-item-title"><p>Writing a Containerfile</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#A_word_on_Buildah"><span class="tree-item-title"><p>A word on Buildah</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
\ No newline at end of file
+</ul></div><div class="heading-wrapper"><h2 data-heading="Build commands" class="heading" id="Build_commands"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Build commands<div class="heading-after">...</div></h2><div class="heading-children"><div><p>To build a container from an existing Containerfile, all that is needed is specifying the directory and a tag, <code>-t</code>, to name the build by. In the following example, we assume the container runs a server on port 80.</p></div><div class="code-styler-pre-parent"><pre class="code-styler-pre" defaultfold="false"><div class="code-styler-header-container-hidden"></div><code><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text">[user@localhost ~]$ ls </div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text"># myServer</div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text">[user@localhost ~]$ podman build -t serverImage myServer/</div></div><div class="code-styler-line"><div class="code-styler-line-number">5</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">6</div><div class="code-styler-line-text">[user@localhost ~]$ podman images</div></div><div class="code-styler-line"><div class="code-styler-line-number">7</div><div class="code-styler-line-text"># REPOSITORY                                   TAG         IMAGE ID      CREATED         SIZE</div></div><div class="code-styler-line"><div class="code-styler-line-number">8</div><div class="code-styler-line-text"># localhost/serverImag                         latest      a463eb6e3e4f  19 minutes ago  249 MB</div></div></code><button class="copy-code-button">Copy</button></pre></div><div><p>This image can then be run through a <code>docker run</code> command. It is advisable to specify a name, though the same name cannot be used twice.</p></div><div class="code-styler-pre-parent"><pre class="code-styler-pre" defaultfold="false"><div class="code-styler-header-container-hidden"></div><code><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text">[user@localhost ~]$ podman run -d -p 8080:80 --name serverInstance serverImage:latest</div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text">[user@localhost ~]$ curl localhost:8080</div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text"># &lt;h1&gt;Server response&lt;/h1&gt;</div></div></code><button class="copy-code-button">Copy</button></pre></div></div></div><div class="heading-wrapper"><h2 data-heading="Writing a Containerfile" class="heading" id="Writing_a_Containerfile"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Writing a Containerfile<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Red Hat provides a <a data-tooltip-position="top" aria-label="https://access.redhat.com/articles/4238681" rel="noopener" class="external-link" href="https://access.redhat.com/articles/4238681" target="_blank"><em>universal basic image</em></a> to base your containers from. It is recommended to use it for any container-related activities within RHEL and RHCSA.</p></div><div><p>Below is a simple containerfile which pulls a standard UBI and installs a httpd server to it. </p></div><div><p>Environment:</p></div><div class="code-styler-pre-parent"><pre class="code-styler-pre" defaultfold="false"><div class="code-styler-header-container-hidden"></div><code><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text">ls ~/myServer/</div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text">index.html  Containerfile</div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text">cat ~/myServer/index.html</div></div><div class="code-styler-line"><div class="code-styler-line-number">5</div><div class="code-styler-line-text"># Hello World</div></div></code><button class="copy-code-button">Copy</button></pre></div><div class="code-styler-pre-parent"><pre class="language-dockerfile code-styler-pre" tabindex="0" defaultfold="false"><div class="code-styler-header-container"><div><img class="code-styler-icon" src="blob:app://obsidian.md/a129fc13-d1d0-44d6-afdd-f3fd171f574b"></div><div class="code-styler-header-language-tag">Docker</div><div class="code-styler-header-text"></div></div><code class="language-dockerfile is-loaded"><div class="code-styler-line"><div class="code-styler-line-number">1</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">FROM</span> registry.access.redhat.com/ubi9/ubi</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">2</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">RUN</span> dnf install -y httpd</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">3</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">EXPOSE</span> 80</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">4</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">5</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">WORKDIR</span> /var/www/html</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">6</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">COPY</span> index.html /var/www/html/index.html</span></div></div><div class="code-styler-line"><div class="code-styler-line-number">7</div><div class="code-styler-line-text"><br></div></div><div class="code-styler-line"><div class="code-styler-line-number">8</div><div class="code-styler-line-text"><span class="token instruction"><span class="token keyword">CMD</span> httpd -D FOREGROUND</span></div></div></code><button class="copy-code-button">Copy</button></pre></div><div><p>You can now build and run the Containerfile as shown above.</p></div><div><p><strong>📝 NOTE:</strong> <em>A Containerfile is a configuration file that automates the steps of creating a container image. It is similar to a Makefile. This flexibility allows developers to build different containers which achieve the same thing. For instance, instead of copying index.html to the workdir it could be printed directly; or the httpd execution command could be written in a different way. Whichever syntax you find most comfortable is likely fine to use.</em></p></div></div></div><div class="heading-wrapper"><h2 data-heading="A word on Buildah" class="heading" id="A_word_on_Buildah"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>A word on Buildah<div class="heading-after">...</div></h2><div class="heading-children"><div><p><code>Buildah</code> is a utility which pre-dates Docker and Containerfiles. It works on a lower-level than <code>podman build</code>, providing finer-grained control. You can experiment with it, but for the levels of detail needed in the RHCSA learning podman and Containerfiles is likely enough. </p></div><div><p>An interesting apsect of Buildah is that it can interactively build a container line-by-line - allowing for trial and error. In production, however, these buildah command are written into a shell script and look similar to a Containerfile anyway. A section of <a data-tooltip-position="top" aria-label="https://developers.redhat.com/blog/2019/02/21/podman-and-buildah-for-docker-users#" rel="noopener" class="external-link" href="https://developers.redhat.com/blog/2019/02/21/podman-and-buildah-for-docker-users#" target="_blank">this article</a> is dedicated to Buildah and explains it well.</p></div><div class="mod-footer"></div></div></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#10c._Build_a_container_from_a_Containerfile"><span class="tree-item-title"><p>10c. Build a container from a Containerfile</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Build_commands"><span class="tree-item-title"><p>Build commands</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Writing_a_Containerfile"><span class="tree-item-title"><p>Writing a Containerfile</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#A_word_on_Buildah"><span class="tree-item-title"><p>A word on Buildah</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
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class="heading-wrapper"><h1 data-heading="10.d Perform basic container management such as running, starting, stopping, and listing running containers" class="heading" id="10.d_Perform_basic_container_management_such_as_running,_starting,_stopping,_and_listing_running_containers"><div class="heading-before"></div>10.d Perform basic container management such as running, starting, stopping, and listing running containers<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Listing Images" class="heading" id="Listing_Images"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Listing Images<div class="heading-after">...</div></h2><div class="heading-children"><div><p>You can use 'podman images'</p></div><div><pre><code># podman images
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class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/6-deploy-configure-and-maintain-systems/6b-start-and-stop-services-and-configure-services-to-start-automatically-at-boot.html"><span class="tree-item-title">6b-start-and-stop-services-and-configure-services-to-start-automatically-at-boot</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/6-deploy-configure-and-maintain-systems/6c-configure-systems-to-boot-into-a-specific-target-automatically.html"><span class="tree-item-title">6c-configure-systems-to-boot-into-a-specific-target-automatically</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="tree-item-title">6f-RHEL8-work-with-package-module-streams</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/6-deploy-configure-and-maintain-systems/6g-modify-the-system-bootloader.html"><span class="tree-item-title">6g-modify-the-system-bootloader</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7d-restrict-network-access-using-firewall-cmd-firewall.html"><span class="tree-item-title">7d-restrict-network-access-using-firewall-cmd-firewall</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">8-Manage-users-and-groups</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a 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fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9-Manage-security</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div 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href="markdown/9-manage-security/9b-rhel9-manage-default-file-permissions.html"><span class="tree-item-title">9b-RHEL9-manage-default-file-permissions</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9c-configure-key-based-authentication-for-ssh.html"><span class="tree-item-title">9c-configure-key-based-authentication-for-ssh</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9d-set-enforcing-and-permissive-modes-for-selinux.html"><span class="tree-item-title">9d-set-enforcing-and-permissive-modes-for-selinux</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="10.d Perform basic container management such as running, starting, stopping, and listing running containers" class="heading" id="10.d_Perform_basic_container_management_such_as_running,_starting,_stopping,_and_listing_running_containers"><div class="heading-before"></div>10.d Perform basic container management such as running, starting, stopping, and listing running containers<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Listing Images" class="heading" id="Listing_Images"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Listing Images<div class="heading-after">...</div></h2><div class="heading-children"><div><p>You can use 'podman images'</p></div><div><pre><code># podman images
 REPOSITORY                 TAG     IMAGE ID      CREATED        SIZE
 docker.io/sameersbn/squid  latest  a68a19f689c3  17 months ago  168 MB
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>Or 'podman image ls'</p></div><div><pre><code># podman image ls
diff --git a/docs/markdown/10-manage-containers/10e-run-a-service-inside-a-container.html b/docs/markdown/10-manage-containers/10e-run-a-service-inside-a-container.html
index b269e1d..30ed109 100644
--- a/docs/markdown/10-manage-containers/10e-run-a-service-inside-a-container.html
+++ b/docs/markdown/10-manage-containers/10e-run-a-service-inside-a-container.html
@@ -1,6 +1,8 @@
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 <script async src="https://www.googletagmanager.com/gtag/js?id=G-46LBC4YTB0"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","G-46LBC4YTB0")</script>
+
+
 			
 		<title>10e-run-a-service-inside-a-container</title>
 		<base href="../../">
@@ -23,7 +25,7 @@
 
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class="heading-wrapper"><h1 data-heading="10.e Run a service inside a container" class="heading" id="10.e_Run_a_service_inside_a_container"><div class="heading-before"></div>10.e Run a service inside a container<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Pre-Setup" class="heading" id="Pre-Setup"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Pre-Setup<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Before we start, we need to enable systemd to be able to write to cgroups when running containers (by default blocked by SELinux). 'cgroups' (or Control Groups) are used for resource management.  </p></div><div><p>This can be done with 'setsebool':</p></div><div><pre><code># setsebool container_manage_cgroup 1
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="10.e Run a service inside a container" class="heading" id="10.e_Run_a_service_inside_a_container"><div class="heading-before"></div>10.e Run a service inside a container<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Pre-Setup" class="heading" id="Pre-Setup"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Pre-Setup<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Before we start, we need to enable systemd to be able to write to cgroups when running containers (by default blocked by SELinux). 'cgroups' (or Control Groups) are used for resource management.  </p></div><div><p>This can be done with 'setsebool':</p></div><div><pre><code># setsebool container_manage_cgroup 1
 </code><button class="copy-code-button">Copy</button></pre></div><div><p><strong>💡 TIP:</strong> <em>If forget what boolean you need to change, just run 'getsebool -a | grep container'. The result will be small and should help you.</em></p></div></div></div><div class="heading-wrapper"><h2 data-heading="Creating a Custom Image and Creating a Container" class="heading" id="Creating_a_Custom_Image_and_Creating_a_Container"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Creating a Custom Image and Creating a Container<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Dockerfile" class="heading" id="Dockerfile"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Dockerfile<div class="heading-after">...</div></h3><div class="heading-children"><div><p>A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. Using docker build users can create an automated build that executes several command-line instructions in succession.</p></div><div><p>Create a file named 'Dockerfile' in an empty folder with the following content (without the line numbers)</p></div><div><pre><code>1 FROM registry.access.redhat.com/ubi8/ubi-init
 2 RUN dnf install -y httpd ; dnf clean all  
 3 RUN systemctl enable httpd.service
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data-heading="10.f Configure a container to start automatically as a systemd service" class="heading" id="10.f_Configure_a_container_to_start_automatically_as_a_systemd_service"><div class="heading-before"></div>10.f Configure a container to start automatically as a systemd service<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
 <li data-line="0"><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/porting-containers-to-systemd-using-podman_building-running-and-managing-containers" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/porting-containers-to-systemd-using-podman_building-running-and-managing-containers" target="_blank">RHEL &gt; 8 &gt; Building, running, and managing containers &gt; Chapter 8. Porting containers to systemd using Podman</a></li>
 <li data-line="1"><a data-tooltip-position="top" aria-label="https://www.redhat.com/sysadmin/podman-shareable-systemd-services" rel="noopener" class="external-link" href="https://www.redhat.com/sysadmin/podman-shareable-systemd-services" target="_blank">Running containers with Podman and shareable systemd services</a></li>
 <li data-line="2"><a data-tooltip-position="top" aria-label="https://developers.redhat.com/blog/2019/04/24/how-to-run-systemd-in-a-container/" rel="noopener" class="external-link" href="https://developers.redhat.com/blog/2019/04/24/how-to-run-systemd-in-a-container/" target="_blank">How to run systemd in a container</a></li>
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class="heading-wrapper"><h1 data-heading="10.g Attach persistent storage to a container" class="heading" id="10.g_Attach_persistent_storage_to_a_container"><div class="heading-before"></div>10.g Attach persistent storage to a container<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Privileged VS Labeling" class="heading" id="Privileged_VS_Labeling"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Privileged VS Labeling<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Many instructions advise you to use the <code>--privileged</code> option to allow mounts to work with podman. This however may not be the best approach because it gives full access to the host (based on the access of the user that started it).  </p></div><div><p>The reason that mounts do not work is due to SELinux (see below):</p></div><div><blockquote>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="10.g Attach persistent storage to a container" class="heading" id="10.g_Attach_persistent_storage_to_a_container"><div class="heading-before"></div>10.g Attach persistent storage to a container<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Privileged VS Labeling" class="heading" id="Privileged_VS_Labeling"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Privileged VS Labeling<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Many instructions advise you to use the <code>--privileged</code> option to allow mounts to work with podman. This however may not be the best approach because it gives full access to the host (based on the access of the user that started it).  </p></div><div><p>The reason that mounts do not work is due to SELinux (see below):</p></div><div><blockquote>
 <p>Labeling systems like SELinux require that proper labels are placed on volume content mounted into a container. Without a label, the security system might prevent the processes running inside the container from using the content.  By default, Podman does not change the labels set by the OS.  </p>
 <p>To change a label in the container context, you can add either of two suffixes :z or :Z to the volume mount. These suffixes tell Podman to relabel file objects on the shared volumes. The z option tells Podman that two containers share the volume content. As a result, Podman labels the content with a shared content label. Shared volume labels allow all containers to read/write content.  The Z option tells Podman to label the content with a private unshared label. Only the current container can use a private volume.</p>
 </blockquote></div><div><p><strong>The '--privileged' option</strong></p></div><div><blockquote>
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses.html"><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7b-configure-hostname-resolution.html"><span class="tree-item-title">7b-configure-hostname-resolution</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7c-configure-network-services-to-start-automatically-at-boot.html"><span class="tree-item-title">7c-configure-network-services-to-start-automatically-at-boot</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div 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fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9-Manage-security</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div 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href="markdown/9-manage-security/9b-rhel9-manage-default-file-permissions.html"><span class="tree-item-title">9b-RHEL9-manage-default-file-permissions</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9c-configure-key-based-authentication-for-ssh.html"><span class="tree-item-title">9c-configure-key-based-authentication-for-ssh</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9d-set-enforcing-and-permissive-modes-for-selinux.html"><span class="tree-item-title">9d-set-enforcing-and-permissive-modes-for-selinux</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9e-list-and-identify-selinux-file-and-process-context.html"><span class="tree-item-title">9e-list-and-identify-selinux-file-and-process-context</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9ex-rhel9-manage-selinux-ports.html"><span class="tree-item-title">9ex-rhel9-manage-selinux-ports</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9f-restore-default-file-contexts.html"><span class="tree-item-title">9f-restore-default-file-contexts</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9g-use-boolean-settings-to-modify-system-selinux-settings.html"><span class="tree-item-title">9g-use-boolean-settings-to-modify-system-selinux-settings</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/9-manage-security/9h-diagnose-and-address-routine-selinux-policy-violations.html"><span class="tree-item-title">9h-diagnose-and-address-routine-selinux-policy-violations</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/additional-resources.html"><span class="tree-item-title">Additional-Resources</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/exam-format.html"><span class="tree-item-title">Exam-Format</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/objectives.html"><span class="tree-item-title">Objectives</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/rules.html"><span class="tree-item-title">Rules</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="readme.html"><span class="tree-item-title">README</span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"><div class="inline-title" data-heading="2-Create-simple-shell-scripts" id="2-Create-simple-shell-scripts" style="display: block;">2-Create-simple-shell-scripts</div></div><div class="heading-wrapper"><h3 data-heading="2. Create simple shell scripts" class="heading" id="2._Create_simple_shell_scripts"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>2. Create simple shell scripts<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
 <li data-line="0">2.a Conditionally execute code (use of: if, test, [], etc.)</li>
 <li data-line="1">2.b Use Looping constructs (for, etc.) to process file, command line input</li>
 <li data-line="2">2.c Process script inputs ($1, $2, etc.)</li>
diff --git a/docs/markdown/2-create-simple-shell-scripts/2a-conditionally-execute-code-(use-of_-if-test-[]-etc.).html b/docs/markdown/2-create-simple-shell-scripts/2a-conditionally-execute-code-(use-of_-if-test-[]-etc.).html
index 96956e9..13837fe 100644
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+++ b/docs/markdown/2-create-simple-shell-scripts/2a-conditionally-execute-code-(use-of_-if-test-[]-etc.).html
@@ -1,6 +1,8 @@
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+
+
 			
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 		<base href="../../">
@@ -23,4 +25,4 @@
 
 <script src="lib/scripts/generated.js"></script>
 
-			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="heading-wrapper"><h1 data-heading="2.a Conditionally execute code (use of: if, test, [], etc.)" class="heading" id="2.a_Conditionally_execute_code_(use_of:_if,_test,_[],_etc.)"><div class="heading-before"></div>2.a Conditionally execute code (use of: if, test, [], etc.)<div class="heading-after">...</div></h1><div class="heading-children"><div><hr></div><div><p><a class="internal-link" data-href="2-Create-simple-shell-scripts.md" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html" target="_self" rel="noopener">⬅️ Back</a> </p></div><div class="mod-footer"></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 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code (use of: if, test, [], etc.)</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></body></html>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="2.a Conditionally execute code (use of: if, test, [], etc.)" class="heading" id="2.a_Conditionally_execute_code_(use_of:_if,_test,_[],_etc.)"><div class="heading-before"></div>2.a Conditionally execute code (use of: if, test, [], etc.)<div class="heading-after">...</div></h1><div class="heading-children"><div><hr></div><div><p><a class="internal-link" data-href="2-Create-simple-shell-scripts.md" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html" target="_self" rel="noopener">⬅️ Back</a> </p></div><div class="mod-footer"></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 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test, [], etc.)</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></body></html>
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class="tree-item-title"><p>2.b Use Looping constructs (for, etc.) to process file, command line input</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></body></html>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="2.c Process script inputs ($1, $2, etc.)" class="heading" id="2.c_Process_script_inputs_($1,_$2,_etc.)"><div class="heading-before"></div>2.c Process script inputs ($1, $2, etc.)<div class="heading-after">...</div></h1><div class="heading-children"><div><hr></div><div><p><a class="internal-link" data-href="2-Create-simple-shell-scripts.md" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html" target="_self" rel="noopener">⬅️ Back</a> </p></div><div class="mod-footer"></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#2.c_Process_script_inputs_($1,_$2,_etc.)"><span class="tree-item-title"><p>2.c Process script inputs ($1, $2, etc.)</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></body></html>
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class="heading-wrapper"><h1 data-heading="2.d Processing output of shell commands within a script" class="heading" id="2.d_Processing_output_of_shell_commands_within_a_script"><div class="heading-before"></div>2.d Processing output of shell commands within a script<div class="heading-after">...</div></h1><div class="heading-children"><div><hr></div><div><p><a class="internal-link" data-href="2-Create-simple-shell-scripts.md" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html" target="_self" rel="noopener">⬅️ Back</a> </p></div><div class="mod-footer"></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="2.d Processing output of shell commands within a script" class="heading" id="2.d_Processing_output_of_shell_commands_within_a_script"><div class="heading-before"></div>2.d Processing output of shell commands within a script<div class="heading-after">...</div></h1><div class="heading-children"><div><hr></div><div><p><a class="internal-link" data-href="2-Create-simple-shell-scripts.md" href="markdown/2-create-simple-shell-scripts/2-create-simple-shell-scripts.html" target="_self" rel="noopener">⬅️ Back</a> </p></div><div class="mod-footer"></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#2.d_Processing_output_of_shell_commands_within_a_script"><span class="tree-item-title"><p>2.d Processing output of shell commands within a script</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></body></html>
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data-heading="3-Operate-running-systems" id="3-Operate-running-systems" style="display: block;">3-Operate-running-systems</div></div><div class="heading-wrapper"><h3 data-heading="3. 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data-heading="3-Operate-running-systems" id="3-Operate-running-systems" style="display: block;">3-Operate-running-systems</div></div><div class="heading-wrapper"><h3 data-heading="3. Operate running systems" class="heading" id="3._Operate_running_systems"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>3. Operate running systems<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
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class="heading-wrapper"><h1 data-heading="3.a Boot, reboot, and shut down a system normally" class="heading" id="3.a_Boot,_reboot,_and_shut_down_a_system_normally"><div class="heading-before"></div>3.a Boot, reboot, and shut down a system normally<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#shutting-down-suspending-hibernating-system_managing-services-with-systemd" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#shutting-down-suspending-hibernating-system_managing-services-with-systemd" target="_blank">RHEL 8 &gt; Configuring basic system settings &gt; Chapter 3. Managing services with systemd &gt; 3.4. Shutting down, suspending, and hibernating the system</a></p></div><div><p>In Red Hat Enterprise Linux 7, the systemctl utility replaced a number of power management commands used in previous versions of Red Hat Enterprise Linux. The commands listed in Table 3.8, “Comparison of power management commands with systemctl” are still available in the system for compatibility reasons, but it is advised that you use systemctl when possible.   </p></div><div><p></p><div src="markdown/3-operate-running-systems/3a-boot-reboot-and-shut-down-a-system-normally/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3a-boot-reboot-and-shut-down-a-system-normally/image.png"></div><p></p></div><div><p><strong>Reboot</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.a Boot, reboot, and shut down a system normally" class="heading" id="3.a_Boot,_reboot,_and_shut_down_a_system_normally"><div class="heading-before"></div>3.a Boot, reboot, and shut down a system normally<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#shutting-down-suspending-hibernating-system_managing-services-with-systemd" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#shutting-down-suspending-hibernating-system_managing-services-with-systemd" target="_blank">RHEL 8 &gt; Configuring basic system settings &gt; Chapter 3. Managing services with systemd &gt; 3.4. Shutting down, suspending, and hibernating the system</a></p></div><div><p>In Red Hat Enterprise Linux 7, the systemctl utility replaced a number of power management commands used in previous versions of Red Hat Enterprise Linux. The commands listed in Table 3.8, “Comparison of power management commands with systemctl” are still available in the system for compatibility reasons, but it is advised that you use systemctl when possible.   </p></div><div><p></p><div src="markdown/3-operate-running-systems/3a-boot-reboot-and-shut-down-a-system-normally/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3a-boot-reboot-and-shut-down-a-system-normally/image.png"></div><p></p></div><div><p><strong>Reboot</strong></p></div><div><ul>
 <li data-line="0"><code>reboot</code></li>
 <li data-line="1"><code>systemctl reboot</code></li>
 <li data-line="2"><code>shutdown –r {now|+m}</code></li>
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class="heading-wrapper"><h1 data-heading="3.b Boot systems into different targets manually" class="heading" id="3.b_Boot_systems_into_different_targets_manually"><div class="heading-before"></div>3.b Boot systems into different targets manually<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Runlevels and Systemd Targets RHEL 8" class="heading" id="Runlevels_and_Systemd_Targets_RHEL_8"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Runlevels and Systemd Targets RHEL 8<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>📝 NOTE:</strong> <em>The comparison of SysV runlevels is mainly for reference.</em></p></div><div class="heading-wrapper"><h3 data-heading="Older SysV runlevels" class="heading" id="Older_SysV_runlevels"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Older SysV runlevels<div class="heading-after">...</div></h3><div class="heading-children"><div><p>"Runlevels" are an obsolete way to start and stop groups of services used in SysV init. Systemd provides a compatibility layer that maps runlevels to targets, and associated binaries like runlevel.</p></div><div><p><code>rc0.d/ rc1.d/ rc2.d/ rc3.d/ rc4.d/ rc5.d/ rc6.d/ rc.d/</code></p></div><div><p></p><div src="markdown/3-operate-running-systems/3b-boot-systems-into-different-targets-manually/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3b-boot-systems-into-different-targets-manually/image.png"></div><p></p></div><div><p>Commands related to SysV runlevel</p></div><div><ul>
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data-heading="3.b Boot systems into different targets manually" class="heading" id="3.b_Boot_systems_into_different_targets_manually"><div class="heading-before"></div>3.b Boot systems into different targets manually<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Runlevels and Systemd Targets RHEL 8" class="heading" id="Runlevels_and_Systemd_Targets_RHEL_8"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Runlevels and Systemd Targets RHEL 8<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>📝 NOTE:</strong> <em>The comparison of SysV runlevels is mainly for reference.</em></p></div><div class="heading-wrapper"><h3 data-heading="Older SysV runlevels" class="heading" id="Older_SysV_runlevels"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Older SysV runlevels<div class="heading-after">...</div></h3><div class="heading-children"><div><p>"Runlevels" are an obsolete way to start and stop groups of services used in SysV init. Systemd provides a compatibility layer that maps runlevels to targets, and associated binaries like runlevel.</p></div><div><p><code>rc0.d/ rc1.d/ rc2.d/ rc3.d/ rc4.d/ rc5.d/ rc6.d/ rc.d/</code></p></div><div><p></p><div src="markdown/3-operate-running-systems/3b-boot-systems-into-different-targets-manually/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3b-boot-systems-into-different-targets-manually/image.png"></div><p></p></div><div><p>Commands related to SysV runlevel</p></div><div><ul>
 <li data-line="0"><code>telinit</code> - Change SysV runlevel</li>
 <li data-line="1"><code>runlevel</code> - Print previous and current SysV runlevel</li>
 </ul></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Systemd Targets" class="heading" id="Systemd_Targets"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Systemd Targets<div class="heading-after">...</div></h2><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#working-with-systemd-targets_managing-services-with-systemd" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#working-with-systemd-targets_managing-services-with-systemd" target="_blank">RHEL 8 &gt; Configuring basic system settings &gt; Chapter 3. Managing services with systemd &gt; 3.3. Working with systemd targets</a></p></div><div><p>List systemd targets</p></div><div><pre><code># systemctl list-units --type=target
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class="heading-wrapper"><h1 data-heading="3.c Interrupt the boot process in order to gain access to a system" class="heading" id="3.c_Interrupt_the_boot_process_in_order_to_gain_access_to_a_system"><div class="heading-before"></div>3.c Interrupt the boot process in order to gain access to a system<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Rescue Modes" class="heading" id="Rescue_Modes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rescue Modes<div class="heading-after">...</div></h2><div class="heading-children"><div><p>As the name implies, rescue mode is there to rescue you from something. In normal operation, your Red Hat Linux system uses files located on your system's hard drive to do everything -- run programs, store your files, and more.</p></div><div><p>However, there may be times when you are unable to get Linux running completely enough to access its files on your system's hard drive. By using rescue mode, it's possible to access the files stored on your system's hard drive.</p></div><div><p>Normally, you'll need to get into rescue mode for one of two reasons:</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.c Interrupt the boot process in order to gain access to a system" class="heading" id="3.c_Interrupt_the_boot_process_in_order_to_gain_access_to_a_system"><div class="heading-before"></div>3.c Interrupt the boot process in order to gain access to a system<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Rescue Modes" class="heading" id="Rescue_Modes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rescue Modes<div class="heading-after">...</div></h2><div class="heading-children"><div><p>As the name implies, rescue mode is there to rescue you from something. In normal operation, your Red Hat Linux system uses files located on your system's hard drive to do everything -- run programs, store your files, and more.</p></div><div><p>However, there may be times when you are unable to get Linux running completely enough to access its files on your system's hard drive. By using rescue mode, it's possible to access the files stored on your system's hard drive.</p></div><div><p>Normally, you'll need to get into rescue mode for one of two reasons:</p></div><div><ul>
 <li data-line="0">You are unable to boot Linux, and you'd like to fix it.</li>
 <li data-line="1">You are having hardware or software problems, and you want to get a few important files off your system's hard drive.</li>
 <li data-line="2">To reset the 'root' user password</li>
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class="heading-wrapper"><h1 data-heading="3.d Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes" class="heading" id="3.d_Identify_CPU/memory_intensive_processes,_adjust_process_priority_with_renice,_and_kill_processes"><div class="heading-before"></div>3.d Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="top" class="heading" id="top"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>top<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The top program provides a dynamic real-time view of a running system. It can display system summary information as well as a list of processes or threads currently being  managed by the Linux kernel.</p></div><div><pre><code>top - 12:32:15 up 11 days, 17:00,  2 users,  load average: 0.01, 0.03, 0.00
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.d Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes" class="heading" id="3.d_Identify_CPU/memory_intensive_processes,_adjust_process_priority_with_renice,_and_kill_processes"><div class="heading-before"></div>3.d Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="top" class="heading" id="top"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>top<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The top program provides a dynamic real-time view of a running system. It can display system summary information as well as a list of processes or threads currently being  managed by the Linux kernel.</p></div><div><pre><code>top - 12:32:15 up 11 days, 17:00,  2 users,  load average: 0.01, 0.03, 0.00
 Tasks: 131 total,   1 running, 130 sleeping,   0 stopped,   0 zombie
 %Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
 MiB Mem :    821.2 total,    185.4 free,    216.3 used,    419.5 buff/cache
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class="heading-wrapper"><h1 data-heading="3.e Adjust process scheduling" class="heading" id="3.e_Adjust_process_scheduling"><div class="heading-before"></div>3.e Adjust process scheduling<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Process Priority vs Nice Value" class="heading" id="Process_Priority_vs_Nice_Value"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Process Priority vs Nice Value<div class="heading-after">...</div></h2><div class="heading-children"><div><p><em>From <code>top</code>'s man page</em></p></div><div><blockquote>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.e Adjust process scheduling" class="heading" id="3.e_Adjust_process_scheduling"><div class="heading-before"></div>3.e Adjust process scheduling<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Process Priority vs Nice Value" class="heading" id="Process_Priority_vs_Nice_Value"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Process Priority vs Nice Value<div class="heading-after">...</div></h2><div class="heading-children"><div><p><em>From <code>top</code>'s man page</em></p></div><div><blockquote>
 <p><strong>PR</strong> -- Priority The scheduling priority of the task. If you see 'rt' in this field, it means the task is running under 'real time' scheduling priority.</p>
 <p><strong>NI</strong> -- Nice Value The nice value of the task. A negative nice value means higher priority, whereas a positive nice value means lower priority. Zero in this field simply means priority will not be adjusted in determining a task's dispatch-ability</p>
 </blockquote></div><div><p>Every process requires a certain amount of system resources, such as CPU time and RAM, to be able to perform its tasks. Each process is assigned a process priority to determine how much CPU or processor time is allocated to it for execution.  </p></div><div><p>In addition to processes, in Linux, there are user processes. Linux allows us to set a level of 'niceness' (a nice value) on a per-user basis. Note that the nice value only controls how much CPU time each process is allocated, but not how much memory can be used or which I/O devices can be used. Bear in mind that the process priority may differ from the nice value. The nice value is how much priority the Linux kernel will grant to each named user, whereas the process priority is the actual priority of a running process.  </p></div><div><p>There are 140 possible process priorities; 0 to 99 for real time and 100 to 139 for users.</p></div><div><p>Nice values ranges from -20 (highest priority) to 19 (lowest priority), with 0 being the default priority.</p></div><div><p>In most cases PR value can be computed by the following formula: PR = 20 + NI. Thus the process with niceness 3 has the priority 23 (20 + 3) and the process with niceness -7 has the priority 13 (20 - 7).</p></div><div><p><strong>Remember</strong></p></div><div><ul>
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class="heading-wrapper"><h1 data-heading="3.f Manage tuning profiles" class="heading" id="3.f_Manage_tuning_profiles"><div class="heading-before"></div>3.f Manage tuning profiles<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/monitoring_and_managing_system_status_and_performance/getting-started-with-tuned_monitoring-and-managing-system-status-and-performance" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/monitoring_and_managing_system_status_and_performance/getting-started-with-tuned_monitoring-and-managing-system-status-and-performance" target="_blank">RHEL 8 &gt; Monitoring and managing system status and performance&gt; Chapter 2. Getting started with tuned</a></p></div><div><p>Tuned is a service that monitors your system and optimizes the performance under certain workloads. The core of Tuned are profiles, which tune your system for different use cases.     </p></div><div class="heading-wrapper"><h2 data-heading="Tuned profiles" class="heading" id="Tuned_profiles"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Tuned profiles<div class="heading-after">...</div></h2><div class="heading-children"><div><p>A detailed analysis of a system can be very time-consuming. Tuned provides a number of predefined profiles for typical use cases. You can also create, modify, and delete profiles.  </p></div><div><p>The profiles provided with Tuned are divided into the following categories:  </p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.f Manage tuning profiles" class="heading" id="3.f_Manage_tuning_profiles"><div class="heading-before"></div>3.f Manage tuning profiles<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/monitoring_and_managing_system_status_and_performance/getting-started-with-tuned_monitoring-and-managing-system-status-and-performance" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/monitoring_and_managing_system_status_and_performance/getting-started-with-tuned_monitoring-and-managing-system-status-and-performance" target="_blank">RHEL 8 &gt; Monitoring and managing system status and performance&gt; Chapter 2. Getting started with tuned</a></p></div><div><p>Tuned is a service that monitors your system and optimizes the performance under certain workloads. The core of Tuned are profiles, which tune your system for different use cases.     </p></div><div class="heading-wrapper"><h2 data-heading="Tuned profiles" class="heading" id="Tuned_profiles"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Tuned profiles<div class="heading-after">...</div></h2><div class="heading-children"><div><p>A detailed analysis of a system can be very time-consuming. Tuned provides a number of predefined profiles for typical use cases. You can also create, modify, and delete profiles.  </p></div><div><p>The profiles provided with Tuned are divided into the following categories:  </p></div><div><ul>
 <li data-line="0">Power-saving profiles  </li>
 <li data-line="1">Performance-boosting profiles       </li>
 </ul></div></div></div><div class="heading-wrapper"><h2 data-heading="Pre-setup to Use Tuned" class="heading" id="Pre-setup_to_Use_Tuned"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Pre-setup to Use Tuned<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Make sure that the package is installed with one of the commands below:</p></div><div><pre><code>[root@localhost systemd]# rpm -qa | grep tuned
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class="heading-wrapper"><h1 data-heading="3.g Locate and interpret system log files and journals" class="heading" id="3.g_Locate_and_interpret_system_log_files_and_journals"><div class="heading-before"></div>3.g Locate and interpret system log files and journals<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>What to know for the exam:</strong></p></div><div><ul>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.g Locate and interpret system log files and journals" class="heading" id="3.g_Locate_and_interpret_system_log_files_and_journals"><div class="heading-before"></div>3.g Locate and interpret system log files and journals<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>What to know for the exam:</strong></p></div><div><ul>
 <li data-line="0">Locations of the logs - /var/log</li>
 <li data-line="1">systemd-analyze</li>
 <li data-line="2">Journalctl</li>
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mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.h Preserve system journals" class="heading" id="3.h_Preserve_system_journals"><div class="heading-before"></div>3.h Preserve system journals<div class="heading-after">...</div></h1><div class="heading-children"><div><p>Normally, 'journald' journals (for RHEL) don't persist through reboots (<a data-tooltip-position="top" aria-label="https://access.redhat.com/solutions/696893" rel="noopener" class="external-link" href="https://access.redhat.com/solutions/696893" target="_blank">RHEL KB</a>). See below:</p></div><div><p></p><div src="markdown/3-operate-running-systems/3h-preserve-system-journals/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3h-preserve-system-journals/image.png"></div><p></p></div><div><p><em>From the man page for systemd-journald</em></p></div><div><blockquote>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.h Preserve system journals" class="heading" id="3.h_Preserve_system_journals"><div class="heading-before"></div>3.h Preserve system journals<div class="heading-after">...</div></h1><div class="heading-children"><div><p>Normally, 'journald' journals (for RHEL) don't persist through reboots (<a data-tooltip-position="top" aria-label="https://access.redhat.com/solutions/696893" rel="noopener" class="external-link" href="https://access.redhat.com/solutions/696893" target="_blank">RHEL KB</a>). See below:</p></div><div><p></p><div src="markdown/3-operate-running-systems/3h-preserve-system-journals/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3h-preserve-system-journals/image.png"></div><p></p></div><div><p><em>From the man page for systemd-journald</em></p></div><div><blockquote>
 <p>The journal service stores log data either persistently below /var/log/journal or in a volatile way below /run/log/journal/ (in the latter case it is lost at reboot). By default, log data is stored persistently if /var/log/journal/ exists during boot, with an implicit fallback to volatile storage otherwise. Use Storage= in journald.conf(5) to configure where log data is placed, independently of the existence of /var/log/journal/.</p>
 <p>On systems where /var/log/journal/ does not exist yet but where persistent logging is desired (and the default journald.conf is used), it is sufficient to create the directory, and ensure it has the correct access modes and ownership:</p>
 <p><code>mkdir -p /var/log/journal</code></p>
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class="heading-wrapper"><h1 data-heading="3.i Start, stop, and check the status of network services" class="heading" id="3.i_Start,_stop,_and_check_the_status_of_network_services"><div class="heading-before"></div>3.i Start, stop, and check the status of network services<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Network Services</strong> - Any services that rely on the network to run</p></div><div><p></p><div src="markdown/3-operate-running-systems/3i-start-stop-and-check-the-status-of-network-services/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3i-start-stop-and-check-the-status-of-network-services/image.png"></div><p></p></div><div><p>Important <code>systemctl</code> options</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.i Start, stop, and check the status of network services" class="heading" id="3.i_Start,_stop,_and_check_the_status_of_network_services"><div class="heading-before"></div>3.i Start, stop, and check the status of network services<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Network Services</strong> - Any services that rely on the network to run</p></div><div><p></p><div src="markdown/3-operate-running-systems/3i-start-stop-and-check-the-status-of-network-services/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/3-operate-running-systems/3i-start-stop-and-check-the-status-of-network-services/image.png"></div><p></p></div><div><p>Important <code>systemctl</code> options</p></div><div><ul>
 <li data-line="0">status</li>
 <li data-line="1">enable - Remember that it creates a symlink (<code>/etc/systemd/system/[target]/</code>)</li>
 <li data-line="2">disable</li>
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class="heading-wrapper"><h1 data-heading="3.j Securely transfer files between systems" class="heading" id="3.j_Securely_transfer_files_between_systems"><div class="heading-before"></div>3.j Securely transfer files between systems<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="3.j Securely transfer files between systems" class="heading" id="3.j_Securely_transfer_files_between_systems"><div class="heading-before"></div>3.j Securely transfer files between systems<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">SCP - Same as SSH but for files (built into SSH). Same flags can be used</li>
 <li data-line="1">SFTP - OpenSSH comes with a built-in SFTP server. By default it's already enabled</li>
 </ul></div><div class="heading-wrapper"><h2 data-heading="SCP" class="heading" id="SCP"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>SCP<div class="heading-after">...</div></h2><div class="heading-children"><div><p>SCP or secure copy allows secure transferring of files between a local host and a remote host or between two remote hosts. It uses the same authentication and security as the Secure Shell (SSH) protocol from which it is based. SCP is loved for it’s simplicity, security and pre-installed availability.</p></div><div class="heading-wrapper"><h3 data-heading="Examples" class="heading" id="Examples"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Examples<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Copy file from local host to a remote host</p></div><div><pre><code>$ scp file.txt username@to_host:/remote/directory/
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="4. Configure local storage" class="heading" id="4._Configure_local_storage"><div class="heading-before"></div>4. Configure local storage<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="4a-list-create-delete-partitions-on-mbr-and-gpt-disks.md" href="markdown/4-configure-local-storage/4a-list-create-delete-partitions-on-mbr-and-gpt-disks.html" target="_self" rel="noopener">4.a List, create, delete partitions on MBR and GPT disks</a></li>
 <li data-line="1"><a class="internal-link" data-href="4b-create-and-remove-physical-volumes.md" href="markdown/4-configure-local-storage/4b-create-and-remove-physical-volumes.html" target="_self" rel="noopener">4.b Create and remove physical volumes</a></li>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="4.a List, create, delete partitions on MBR and GPT disks" class="heading" id="4.a_List,_create,_delete_partitions_on_MBR_and_GPT_disks"><div class="heading-before"></div>4.a List, create, delete partitions on MBR and GPT disks<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands to know for the exam:</strong></p></div><div><ul>
 <li data-line="0"><code>df</code></li>
 <li data-line="1"><code>lsblk</code></li>
 <li data-line="2"><code>blkid</code></li>
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class="heading-wrapper"><h1 data-heading="4.b Create and remove physical volumes" class="heading" id="4.b_Create_and_remove_physical_volumes"><div class="heading-before"></div>4.b Create and remove physical volumes<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Logical Volume Manager" class="heading" id="Logical_Volume_Manager"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Logical Volume Manager<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Logical Volume Manager (LVM) is a device mapper target that provides logical volume management for the Linux kernel. 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="4.b Create and remove physical volumes" class="heading" id="4.b_Create_and_remove_physical_volumes"><div class="heading-before"></div>4.b Create and remove physical volumes<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Logical Volume Manager" class="heading" id="Logical_Volume_Manager"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Logical Volume Manager<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Logical Volume Manager (LVM) is a device mapper target that provides logical volume management for the Linux kernel. LVM allows a pool of space to manage storage.  </p></div><div><p></p><div src="markdown/4-configure-local-storage/4b-create-and-remove-physical-volumes/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/4-configure-local-storage/4b-create-and-remove-physical-volumes/image.png"></div><p></p></div><div><ul>
 <li data-line="0"><strong>PV</strong> - Physical Volumes are directly related to hard drives or partitions</li>
 <li data-line="1"><strong>VG</strong> - A Volume Group can have multiple physical Volumes</li>
 <li data-line="2"><strong>LV</strong> - A Logical Volume sits inside a Volume Group and it's what is assigned to a file system (/root, /home, etc...)</li>
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class="heading-wrapper"><h1 data-heading="4.c Assign physical volumes to volume groups" class="heading" id="4.c_Assign_physical_volumes_to_volume_groups"><div class="heading-before"></div>4.c Assign physical volumes to volume groups<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Working with Volume Groups" class="heading" id="Working_with_Volume_Groups"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Working with Volume Groups<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="4.c Assign physical volumes to volume groups" class="heading" id="4.c_Assign_physical_volumes_to_volume_groups"><div class="heading-before"></div>4.c Assign physical volumes to volume groups<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Working with Volume Groups" class="heading" id="Working_with_Volume_Groups"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Working with Volume Groups<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">lvm (8)                  - LVM2 tools</li>
 <li data-line="1">vgcreate (8)         - Create a volume group</li>
 <li data-line="2">vgdisplay (8)        - Display volume group information</li>
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class="heading-wrapper"><h1 data-heading="4.d Create and delete logical volumes" class="heading" id="4.d_Create_and_delete_logical_volumes"><div class="heading-before"></div>4.d Create and delete logical volumes<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Working with Logical Volumes" class="heading" id="Working_with_Logical_Volumes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Working with Logical Volumes<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="4.d Create and delete logical volumes" class="heading" id="4.d_Create_and_delete_logical_volumes"><div class="heading-before"></div>4.d Create and delete logical volumes<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Working with Logical Volumes" class="heading" id="Working_with_Logical_Volumes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Working with Logical Volumes<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">lvm (8)                  - LVM2 tools</li>
 <li data-line="1">lvcreate (8)          - Create a logical volume</li>
 <li data-line="2">lvdisplay (8)         - Display information about a logical volume</li>
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class="heading-wrapper"><h1 data-heading="4.e Configure systems to mount file systems at boot by Universally Unique ID (UUID) or label" class="heading" id="4.e_Configure_systems_to_mount_file_systems_at_boot_by_Universally_Unique_ID_(UUID)_or_label"><div class="heading-before"></div>4.e Configure systems to mount file systems at boot by Universally Unique ID (UUID) or label<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Non-persistent naming attributes" class="heading" id="Non-persistent_naming_attributes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Non-persistent naming attributes<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Traditionally, non-persistent names in the form of <code>/dev/sd*(major number)**(minor number)*</code> are used on Linux to refer to storage devices. The major and minor number range and associated <code>sd</code> names are allocated for each device when it is detected. This means that the association between the major and minor number range and associated <code>sd</code> names can change if the order of device detection changes.</p></div><div><p>Such a change in the ordering might occur in the following situations:</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="4.e Configure systems to mount file systems at boot by Universally Unique ID (UUID) or label" class="heading" id="4.e_Configure_systems_to_mount_file_systems_at_boot_by_Universally_Unique_ID_(UUID)_or_label"><div class="heading-before"></div>4.e Configure systems to mount file systems at boot by Universally Unique ID (UUID) or label<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Non-persistent naming attributes" class="heading" id="Non-persistent_naming_attributes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Non-persistent naming attributes<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Traditionally, non-persistent names in the form of <code>/dev/sd*(major number)**(minor number)*</code> are used on Linux to refer to storage devices. The major and minor number range and associated <code>sd</code> names are allocated for each device when it is detected. This means that the association between the major and minor number range and associated <code>sd</code> names can change if the order of device detection changes.</p></div><div><p>Such a change in the ordering might occur in the following situations:</p></div><div><ul>
 <li data-line="0">The parallelization of the system boot process detects storage devices in a different order with each system boot.</li>
 <li data-line="1">A disk fails to power up or respond to the SCSI controller.</li>
 <li data-line="2">A SCSI controller (host bus adapter, or HBA) fails to initialize, causing all disks connected to that HBA to not be detected.</li>
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class="heading-wrapper"><h1 data-heading="4.f Add new partitions and logical volumes, and swap to a system non-destructively" class="heading" id="4.f_Add_new_partitions_and_logical_volumes,_and_swap_to_a_system_non-destructively"><div class="heading-before"></div>4.f Add new partitions and logical volumes, and swap to a system non-destructively<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Adding a New Swap Logical Volume" class="heading" id="Adding_a_New_Swap_Logical_Volume"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Adding a New Swap Logical Volume<div class="heading-after">...</div></h3><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="4.f Add new partitions and logical volumes, and swap to a system non-destructively" class="heading" id="4.f_Add_new_partitions_and_logical_volumes,_and_swap_to_a_system_non-destructively"><div class="heading-before"></div>4.f Add new partitions and logical volumes, and swap to a system non-destructively<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Adding a New Swap Logical Volume" class="heading" id="Adding_a_New_Swap_Logical_Volume"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Adding a New Swap Logical Volume<div class="heading-after">...</div></h3><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">mkswap (8)           - set up a Linux swap area</li>
 <li data-line="1">swapon (2)           - start/stop swapping to file/device</li>
 </ul></div><div><p>Create a physical volume</p></div><div><pre><code># pvcreate /dev/sdd  
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data-heading="5-Create-and-configure-file-systems" id="5-Create-and-configure-file-systems" style="display: block;">5-Create-and-configure-file-systems</div></div><div class="heading-wrapper"><h3 data-heading="5. Create and configure file systems" class="heading" id="5._Create_and_configure_file_systems"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>5. Create and configure file systems<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="5a-create-mount-unmount-and-use-vfat-ext4-and-xfs-file-systems.md" href="markdown/5-create-and-configure-file-systems/5a-create-mount-unmount-and-use-vfat-ext4-and-xfs-file-systems.html" target="_self" rel="noopener">5.a Create, mount, unmount, and use vfat, ext4, and xfs file systems</a></li>
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class="heading-wrapper"><h1 data-heading="5.a Create, mount, unmount, and use vfat, ext4, and xfs file systems" class="heading" id="5.a_Create,_mount,_unmount,_and_use_vfat,_ext4,_and_xfs_file_systems"><div class="heading-before"></div>5.a Create, mount, unmount, and use vfat, ext4, and xfs file systems<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Introduction" class="heading" id="Introduction"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Introduction<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Superblock" class="heading" id="Superblock"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Superblock<div class="heading-after">...</div></h3><div class="heading-children"><div><p>A superblock is a record of the characteristics of a filesystem, including its size, the block size, the empty and the filled blocks and their respective counts, the size and location of the inode tables, the disk block map and usage information, and the size of the block groups.</p></div></div></div><div class="heading-wrapper"><h3 data-heading="Fstab" class="heading" id="Fstab"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Fstab<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The file fstab contains descriptive information about the filesystems the system can mount.</p></div><div><p><strong>See man pages for:</strong></p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="5.a Create, mount, unmount, and use vfat, ext4, and xfs file systems" class="heading" id="5.a_Create,_mount,_unmount,_and_use_vfat,_ext4,_and_xfs_file_systems"><div class="heading-before"></div>5.a Create, mount, unmount, and use vfat, ext4, and xfs file systems<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Introduction" class="heading" id="Introduction"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Introduction<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Superblock" class="heading" id="Superblock"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Superblock<div class="heading-after">...</div></h3><div class="heading-children"><div><p>A superblock is a record of the characteristics of a filesystem, including its size, the block size, the empty and the filled blocks and their respective counts, the size and location of the inode tables, the disk block map and usage information, and the size of the block groups.</p></div></div></div><div class="heading-wrapper"><h3 data-heading="Fstab" class="heading" id="Fstab"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Fstab<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The file fstab contains descriptive information about the filesystems the system can mount.</p></div><div><p><strong>See man pages for:</strong></p></div><div><ul>
 <li data-line="0">
 <p>fstab (5)            - static information about the filesystems</p>
 </li>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5.b Mount and unmount network file systems using NFS" class="heading" id="5.b_Mount_and_unmount_network_file_systems_using_NFS"><div class="heading-before"></div>5.b Mount and unmount network file systems using NFS<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Network File System (NFS) is a distributed file system protocol originally developed by Sun Microsystems (Sun) in 1984,[1] allowing a user on a client computer to access files over a computer network much like local storage is accessed. NFS, like many other protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC) system.  </p></div><div><p><strong>Commands and Man Pages:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5.b Mount and unmount network file systems using NFS" class="heading" id="5.b_Mount_and_unmount_network_file_systems_using_NFS"><div class="heading-before"></div>5.b Mount and unmount network file systems using NFS<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Network File System (NFS) is a distributed file system protocol originally developed by Sun Microsystems (Sun) in 1984,[1] allowing a user on a client computer to access files over a computer network much like local storage is accessed. NFS, like many other protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC) system.  </p></div><div><p><strong>Commands and Man Pages:</strong></p></div><div><ul>
 <li data-line="0">nfs (5)                  - fstab format and options for the nfs file systems</li>
 <li data-line="1">exports (5)          - NFS server export table</li>
 <li data-line="2">exportfs (8)         - maintain table of exported NFS file systems</li>
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data-heading="5c-RHEL9-configure-autofs" id="5c-RHEL9-configure-autofs" style="display: block;">5c-RHEL9-configure-autofs</div></div><div><p>��# 5.c Configure autofs<br>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"><div class="inline-title" data-heading="5c-RHEL9-configure-autofs" id="5c-RHEL9-configure-autofs" style="display: block;">5c-RHEL9-configure-autofs</div></div><div><p>��# 5.c Configure autofs<br>
 <br>
 Although network devices can be mounted at boot using <code>/etc/fstab</code>, mounts configured this way consume additional resources because they are always mounted and therefore don't scale well. <code>autofs</code> works with the kernel to mount drives only when they are accessed, improving performance.<br>
 <br>
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class="heading-wrapper"><h1 data-heading="5.c Extend existing logical volumes" class="heading" id="5.c_Extend_existing_logical_volumes"><div class="heading-before"></div>5.c Extend existing logical volumes<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>This topic includes:</strong></p></div><div><ul>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="5.c Extend existing logical volumes" class="heading" id="5.c_Extend_existing_logical_volumes"><div class="heading-before"></div>5.c Extend existing logical volumes<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>This topic includes:</strong></p></div><div><ul>
 <li data-line="0">Resizing logical volumes</li>
 <li data-line="1">Resizing filesystem
 <ul>
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class="heading-wrapper"><h1 data-heading="5.d Create and configure set-GID directories for collaboration" class="heading" id="5.d_Create_and_configure_set-GID_directories_for_collaboration"><div class="heading-before"></div>5.d Create and configure set-GID directories for collaboration<div class="heading-after">...</div></h1><div class="heading-children"><div><p>This includes setting SGID and adding users to the same group.  </p></div><div><p><strong>Commands:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5.d Create and configure set-GID directories for collaboration" class="heading" id="5.d_Create_and_configure_set-GID_directories_for_collaboration"><div class="heading-before"></div>5.d Create and configure set-GID directories for collaboration<div class="heading-after">...</div></h1><div class="heading-children"><div><p>This includes setting SGID and adding users to the same group.  </p></div><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">chmod (1)            - change file mode bits</li>
 <li data-line="1">usermod (8)          - modify a user account</li>
 <li data-line="2">useradd (8)          - create a new user or update default new user information</li>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5e-configure-disk-compression" class="heading" id="5e-configure-disk-compression"><div class="heading-before"></div>5e-configure-disk-compression<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Virtual Data Optimizer (VDO) provides inline data reduction for Linux in the form of deduplication, compression, and thin provisioning. When you set up a VDO volume, you specify a block device on which to construct your VDO volume and the amount of logical storage you plan to present.  </p></div><div><p>In the Red Hat Enterprise Linux 7.5 Beta, we introduced virtual data optimizer (VDO). VDO is a kernel module that can save disk space and reduce replication bandwidth. VDO sits on top of any block storage device and provides zero-block elimination, deduplication of redundant blocks, and data compression.  </p></div><div><p>VDO can be applied to a block device, and then normal disk operations can be applied to that device. LVM for example, can sit on top of VDO.</p></div><div><p>Physical disk -&gt; VDO -&gt; Volume group -&gt; Logical volume -&gt; filesystem</p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image.png"></div><p></p></div></div></div><div class="heading-wrapper"><h2 data-heading="Requirements and Recommendations" class="heading" id="Requirements_and_Recommendations"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Requirements and Recommendations<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Memory" class="heading" id="Memory"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Memory<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Each VDO volume has two distinct memory requirements:  </p></div><div><p>The VDO module</p></div><div><p>VDO requires 370 MB of RAM plus an additional 268 MB per each 1 TB of physical storage managed by the volume.  </p></div><div><p>The Universal Deduplication Service (UDS) index</p></div><div><p>UDS requires a minimum of 250 MB of DRAM, which is also the default amount that deduplication uses.  </p></div><div><p>The memory required for the UDS index is determined by the index type and the required size of the de-duplication window:       </p></div><div><p></p><div src="5e-configure-disk-compression/image2png" class="internal-embed is-loaded file-embed mod-empty">"5e-configure-disk-compression/image2png" is not created yet. Click to create.</div><p></p></div><div><p><strong>📝 NOTE:</strong> <em>Sparse is the recommended configuration.</em></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Storage" class="heading" id="Storage"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Storage<div class="heading-after">...</div></h3><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="Logical Size" class="heading" id="Logical_Size"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Logical Size<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Specifies the logical VDO volume size. The VDO Logical Size is how much storage we tell the OS that we have. Because of reduction and deduplication, this number will be bigger than the real physical size. This ratio will vary according to the type of data that is being stored (binary, video, audio, compressed data will have a very low ratio).  </p></div><div class="heading-wrapper"><h5 data-heading="Red Hat's Recommendation" class="heading" id="Red_Hat's_Recommendation"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Red Hat's Recommendation<div class="heading-after">...</div></h5><div class="heading-children"><div><p><em><strong>For active VMs or container storage</strong></em></p></div><div><p>Use logical size that is ten times the physical size of your block device. For example, if your block device is 1TB in size, use 10T here.  </p></div><div><p><em><strong>For object storage</strong></em></p></div><div><p>Use logical size that is three times the physical size of your block device. For example, if your block device is 1TB in size, use 3T here.            </p></div></div></div></div></div><div class="heading-wrapper"><h4 data-heading="Slab Size" class="heading" id="Slab_Size"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Slab Size<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Specifies the size of the increment by which a VDO is grown. All of the slabs for a given volume will be of the same size, which may be any power of 2 multiple of 128 MB up to 32 GB. At least one entire slab is reserved by VDO for metadata, and therefore cannot be used for storing user data.  </p></div><div><p>The default slab size is 2 GB in order to facilitate evaluating VDO on smaller test systems. A single VDO volume may have up to 8096 slabs. Therefore, in the default configuration with 2 GB slabs, the maximum allowed physical storage is 16 TB. When using 32 GB slabs, the maximum allowed physical storage is 256 TB.</p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image3.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image3.png"></div><br>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5e-configure-disk-compression" class="heading" id="5e-configure-disk-compression"><div class="heading-before"></div>5e-configure-disk-compression<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Virtual Data Optimizer (VDO) provides inline data reduction for Linux in the form of deduplication, compression, and thin provisioning. When you set up a VDO volume, you specify a block device on which to construct your VDO volume and the amount of logical storage you plan to present.  </p></div><div><p>In the Red Hat Enterprise Linux 7.5 Beta, we introduced virtual data optimizer (VDO). VDO is a kernel module that can save disk space and reduce replication bandwidth. VDO sits on top of any block storage device and provides zero-block elimination, deduplication of redundant blocks, and data compression.  </p></div><div><p>VDO can be applied to a block device, and then normal disk operations can be applied to that device. LVM for example, can sit on top of VDO.</p></div><div><p>Physical disk -&gt; VDO -&gt; Volume group -&gt; Logical volume -&gt; filesystem</p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image.png"></div><p></p></div></div></div><div class="heading-wrapper"><h2 data-heading="Requirements and Recommendations" class="heading" id="Requirements_and_Recommendations"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Requirements and Recommendations<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Memory" class="heading" id="Memory"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Memory<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Each VDO volume has two distinct memory requirements:  </p></div><div><p>The VDO module</p></div><div><p>VDO requires 370 MB of RAM plus an additional 268 MB per each 1 TB of physical storage managed by the volume.  </p></div><div><p>The Universal Deduplication Service (UDS) index</p></div><div><p>UDS requires a minimum of 250 MB of DRAM, which is also the default amount that deduplication uses.  </p></div><div><p>The memory required for the UDS index is determined by the index type and the required size of the de-duplication window:       </p></div><div><p></p><div src="5e-configure-disk-compression/image2png" class="internal-embed is-loaded file-embed mod-empty">"5e-configure-disk-compression/image2png" is not created yet. Click to create.</div><p></p></div><div><p><strong>📝 NOTE:</strong> <em>Sparse is the recommended configuration.</em></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Storage" class="heading" id="Storage"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Storage<div class="heading-after">...</div></h3><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="Logical Size" class="heading" id="Logical_Size"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Logical Size<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Specifies the logical VDO volume size. The VDO Logical Size is how much storage we tell the OS that we have. Because of reduction and deduplication, this number will be bigger than the real physical size. This ratio will vary according to the type of data that is being stored (binary, video, audio, compressed data will have a very low ratio).  </p></div><div class="heading-wrapper"><h5 data-heading="Red Hat's Recommendation" class="heading" id="Red_Hat's_Recommendation"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Red Hat's Recommendation<div class="heading-after">...</div></h5><div class="heading-children"><div><p><em><strong>For active VMs or container storage</strong></em></p></div><div><p>Use logical size that is ten times the physical size of your block device. For example, if your block device is 1TB in size, use 10T here.  </p></div><div><p><em><strong>For object storage</strong></em></p></div><div><p>Use logical size that is three times the physical size of your block device. For example, if your block device is 1TB in size, use 3T here.            </p></div></div></div></div></div><div class="heading-wrapper"><h4 data-heading="Slab Size" class="heading" id="Slab_Size"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Slab Size<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Specifies the size of the increment by which a VDO is grown. All of the slabs for a given volume will be of the same size, which may be any power of 2 multiple of 128 MB up to 32 GB. At least one entire slab is reserved by VDO for metadata, and therefore cannot be used for storing user data.  </p></div><div><p>The default slab size is 2 GB in order to facilitate evaluating VDO on smaller test systems. A single VDO volume may have up to 8096 slabs. Therefore, in the default configuration with 2 GB slabs, the maximum allowed physical storage is 16 TB. When using 32 GB slabs, the maximum allowed physical storage is 256 TB.</p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image3.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image3.png"></div><br>
 <em>The table above is from RHEL 7 documentation</em><p></p></div></div></div><div class="heading-wrapper"><h4 data-heading="Examples of VDO System Requirements by Physical Volume Size" class="heading" id="Examples_of_VDO_System_Requirements_by_Physical_Volume_Size"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Examples of VDO System Requirements by Physical Volume Size<div class="heading-after">...</div></h4><div class="heading-children"><div><p>The following tables provide approximate system requirements of VDO based on the size of the underlying physical volume. Each table lists requirements appropriate to the intended deployment, such as primary storage or backup storage.    </p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image4.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image4.png"></div><p></p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image5.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5e-configure-disk-compression/image5.png"></div><p></p></div></div></div></div></div><div class="heading-wrapper"><h3 data-heading="Deduplication, Indexing and Compression" class="heading" id="Deduplication,_Indexing_and_Compression"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Deduplication, Indexing and Compression<div class="heading-after">...</div></h3><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="Deduplication and Index" class="heading" id="Deduplication_and_Index"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Deduplication and Index<div class="heading-after">...</div></h4><div class="heading-children"><div><p>VDO uses a high-performance deduplication index called UDS to detect duplicate blocks of data as they are being stored.</p></div><div><p>The UDS index provides the foundation of the VDO product. For each new piece of data, it quickly determines if that piece is identical to any previously stored piece of data. If the index finds match, the storage system can then internally reference the existing item to avoid storing the same information more than once.</p></div><div><p>Deduplication is enabled by default.  </p></div><div><p>To disable deduplication during VDO block creation (so only compression is used), use the <code>--deduplication=disabled</code> option (you will not be able to use the 'sparseIndex' option)</p></div><div><pre><code># vdo create --name=[name] --device=/dev/[device] --vdoLogicalSize=[VDO logical size] --deduplication=disabled
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>To enable/disable deduplication on an existing block</p></div><div><pre><code># vdo enableDeduplication --name=my_vdo
 
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5.f Manage layered storage" class="heading" id="5.f_Manage_layered_storage"><div class="heading-before"></div>5.f Manage layered storage<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/managing-layered-local-storage-with-stratis_managing-storage-devices" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/managing-layered-local-storage-with-stratis_managing-storage-devices" target="_blank">RHEL &gt; 8 &gt; Managing storage devices &gt; Chapter 19. Managing layered local storage with Stratis</a></p></div><div class="heading-wrapper"><h2 data-heading="Stratis Definition" class="heading" id="Stratis_Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Stratis Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Stratis automates the management of local storage. On a system with just a single disk, Stratis can make it more convenient to logically separate /home from /usr, and enable snapshot with rollback on each separately. On larger configurations, Stratis can make it easier to create a multi-disk, multi-tiered storage pool, monitor the pool, and then manage the pool with less administrator effort.</p></div><div><p>Stratis is not a traditional filesystem like ext4, XFS, or FAT32. Stratis manages block devices and filesystems to support features akin to “volume-managing filesystems” (VMFs) like ZFS and Btrfs. Whereas a traditional filesystem acts to support directory and file operations on top of a single block device, VMFs can incorporate multiple block devices into a “pool”. Multiple independent filesystems can be created, each backed by the storage pool.</p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5f-manage-layered-storage/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5f-manage-layered-storage/image.png"></div><p></p></div><div class="heading-wrapper"><h3 data-heading="Supported block devices" class="heading" id="Supported_block_devices"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Supported block devices<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Stratis pools have been tested to work on these types of block devices:  </p></div><div><ul>
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5.f Manage layered storage" class="heading" id="5.f_Manage_layered_storage"><div class="heading-before"></div>5.f Manage layered storage<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/managing-layered-local-storage-with-stratis_managing-storage-devices" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/managing-layered-local-storage-with-stratis_managing-storage-devices" target="_blank">RHEL &gt; 8 &gt; Managing storage devices &gt; Chapter 19. Managing layered local storage with Stratis</a></p></div><div class="heading-wrapper"><h2 data-heading="Stratis Definition" class="heading" id="Stratis_Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Stratis Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Stratis automates the management of local storage. On a system with just a single disk, Stratis can make it more convenient to logically separate /home from /usr, and enable snapshot with rollback on each separately. On larger configurations, Stratis can make it easier to create a multi-disk, multi-tiered storage pool, monitor the pool, and then manage the pool with less administrator effort.</p></div><div><p>Stratis is not a traditional filesystem like ext4, XFS, or FAT32. Stratis manages block devices and filesystems to support features akin to “volume-managing filesystems” (VMFs) like ZFS and Btrfs. Whereas a traditional filesystem acts to support directory and file operations on top of a single block device, VMFs can incorporate multiple block devices into a “pool”. Multiple independent filesystems can be created, each backed by the storage pool.</p></div><div><p></p><div src="markdown/5-create-and-configure-file-systems/5f-manage-layered-storage/image.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/5-create-and-configure-file-systems/5f-manage-layered-storage/image.png"></div><p></p></div><div class="heading-wrapper"><h3 data-heading="Supported block devices" class="heading" id="Supported_block_devices"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Supported block devices<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Stratis pools have been tested to work on these types of block devices:  </p></div><div><ul>
 <li data-line="0">LUKS  </li>
 <li data-line="1">LVM logical volumes  </li>
 <li data-line="2">MD RAID  </li>
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class="heading-wrapper"><h1 data-heading="5.g Diagnose and correct file permission problems" class="heading" id="5.g_Diagnose_and_correct_file_permission_problems"><div class="heading-before"></div>5.g Diagnose and correct file permission problems<div class="heading-after">...</div></h1><div class="heading-children"><div><p>It looks like this topic includes troubleshooting around knowledge covered in the following topics:</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="5.g Diagnose and correct file permission problems" class="heading" id="5.g_Diagnose_and_correct_file_permission_problems"><div class="heading-before"></div>5.g Diagnose and correct file permission problems<div class="heading-after">...</div></h1><div class="heading-children"><div><p>It looks like this topic includes troubleshooting around knowledge covered in the following topics:</p></div><div><ul>
 <li data-line="0">1.Understand and use essential tools
 <ul>
 <li data-line="1"><a class="internal-link" data-href="../1-Understand-and-use-essential-tools/1j-List-set-and-change-standard-ugo_rwx-permissions.md" href="markdown/1-understand-and-use-essential-tools/1j-list-set-and-change-standard-ugo_rwx-permissions.html" target="_self" rel="noopener">1.j List, set, and change standard ugo/rwx permissions</a></li>
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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data-heading="6. Deploy, configure, and maintain systems" class="heading" id="6._Deploy,_configure,_and_maintain_systems"><div class="heading-before"></div>6. Deploy, configure, and maintain systems<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="6a-schedule-tasks-using-at-and-cron.md" href="markdown/6-deploy-configure-and-maintain-systems/6a-schedule-tasks-using-at-and-cron.html" target="_self" rel="noopener">6.a Schedule tasks using at and cron</a></li>
 <li data-line="1"><a class="internal-link" data-href="6b-start-and-stop-services-and-configure-services-to-start-automatically-at-boot.md" href="markdown/6-deploy-configure-and-maintain-systems/6b-start-and-stop-services-and-configure-services-to-start-automatically-at-boot.html" target="_self" rel="noopener">6.b Start and stop services and configure services to start automatically at boot</a></li>
 <li data-line="2"><a class="internal-link" data-href="6c-configure-systems-to-boot-into-a-specific-target-automatically.md" href="markdown/6-deploy-configure-and-maintain-systems/6c-configure-systems-to-boot-into-a-specific-target-automatically.html" target="_self" rel="noopener">6.c Configure systems to boot into a specific target automatically</a></li>
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class="heading-wrapper"><h1 data-heading="6.a Schedule tasks using at and cron" class="heading" id="6.a_Schedule_tasks_using_at_and_cron"><div class="heading-before"></div>6.a Schedule tasks using at and cron<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>⚠️ WARNING:</strong> <em>For tasks to work, it's important that the user credentials have not expired. Use 'chage -l [user]' to check.</em></p></div><div><pre><code>[root@rhel8 system]# chage -l root
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png"><span class="tree-item-title">1d-Access-remote-systems-using-SSH-c3524</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1g-create-and-edit-text-files</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html"><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1a-access-a-shell-prompt-and-issue-commands-with-correct-syntax.html"><span class="tree-item-title">1a-Access-a-shell-prompt-and-issue-commands-with-correct-syntax</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" 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class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1e-log-in-and-switch-users-in-multiuser-targets.html"><span class="tree-item-title">1e-Log-in-and-switch-users-in-multiuser-targets</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2.html"><span class="tree-item-title">1f-Archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html"><span class="tree-item-title">1g-Create-and-edit-text-files</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1h-create-delete-copy-and-move-files-and-directories.html"><span class="tree-item-title">1h-Create-delete-copy-and-move-files-and-directories</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html"><span class="tree-item-title">1i-Create-hard-and-soft-links</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div 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xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10-manage-containers</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">10a-find-and-retrieve-container-images-from-a-remote-registry</span></a></div><div class="tree-item-children" style="display: none;"><div 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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="6.a Schedule tasks using at and cron" class="heading" id="6.a_Schedule_tasks_using_at_and_cron"><div class="heading-before"></div>6.a Schedule tasks using at and cron<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>⚠️ WARNING:</strong> <em>For tasks to work, it's important that the user credentials have not expired. Use 'chage -l [user]' to check.</em></p></div><div><pre><code>[root@rhel8 system]# chage -l root
 Last password change					: Nov 11, 2020
 Password expires					: never
 Password inactive					: never
diff --git a/docs/markdown/6-deploy-configure-and-maintain-systems/6b-start-and-stop-services-and-configure-services-to-start-automatically-at-boot.html b/docs/markdown/6-deploy-configure-and-maintain-systems/6b-start-and-stop-services-and-configure-services-to-start-automatically-at-boot.html
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="heading-wrapper"><h1 data-heading="6.b Start and stop services and configure services to start automatically at boot" class="heading" id="6.b_Start_and_stop_services_and_configure_services_to_start_automatically_at_boot"><div class="heading-before"></div>6.b Start and stop services and configure services to start automatically at boot<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Systemctl options to Know</strong></p></div><div><ul>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="6.b Start and stop services and configure services to start automatically at boot" class="heading" id="6.b_Start_and_stop_services_and_configure_services_to_start_automatically_at_boot"><div class="heading-before"></div>6.b Start and stop services and configure services to start automatically at boot<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Systemctl options to Know</strong></p></div><div><ul>
 <li data-line="0">status - Show terse runtime status information about one or more units</li>
 <li data-line="1">list-unit-files - List unit files installed on the system</li>
 <li data-line="2">list-units - List units that systemd currently has in memory</li>
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class="heading-wrapper"><h1 data-heading="6.c Configure systems to boot into a specific target automatically" class="heading" id="6.c_Configure_systems_to_boot_into_a_specific_target_automatically"><div class="heading-before"></div>6.c Configure systems to boot into a specific target automatically<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Systemd Targets" class="heading" id="Systemd_Targets"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Systemd Targets<div class="heading-after">...</div></h2><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#working-with-systemd-targets_managing-services-with-systemd" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#working-with-systemd-targets_managing-services-with-systemd" target="_blank">RHEL 8 &gt; Configuring basic system settings &gt; Chapter 3. Managing services with systemd &gt; 3.3. Working with systemd targets </a></p></div><div><p>List systemd targets  </p></div><div><pre><code># systemctl list-units --type=target
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="6.c Configure systems to boot into a specific target automatically" class="heading" id="6.c_Configure_systems_to_boot_into_a_specific_target_automatically"><div class="heading-before"></div>6.c Configure systems to boot into a specific target automatically<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Systemd Targets" class="heading" id="Systemd_Targets"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Systemd Targets<div class="heading-after">...</div></h2><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#working-with-systemd-targets_managing-services-with-systemd" rel="noopener" class="external-link" href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-services-with-systemd_configuring-basic-system-settings#working-with-systemd-targets_managing-services-with-systemd" target="_blank">RHEL 8 &gt; Configuring basic system settings &gt; Chapter 3. Managing services with systemd &gt; 3.3. Working with systemd targets </a></p></div><div><p>List systemd targets  </p></div><div><pre><code># systemctl list-units --type=target
 UNIT                   LOAD   ACTIVE SUB    DESCRIPTION                 
 basic.target           loaded active active Basic System                
 cryptsetup.target      loaded active active Local Encrypted Volumes     
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="6.d Configure time service clients" class="heading" id="6.d_Configure_time_service_clients"><div class="heading-before"></div>6.d Configure time service clients<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="NTP Overview" class="heading" id="NTP_Overview"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>NTP Overview<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.</p></div><div><p>NTP synchronizes the clocks of computer systems. It can read the time from a reference source, then transmit the reading to one or more clients and adjust each client clock as required</p></div><div class="heading-wrapper"><h3 data-heading="Stratum" class="heading" id="Stratum"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Stratum<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Large computer networks can have many devices acting as NTP servers. Where multiple NTP sources are available, NTP clients need some way of (a) judging which time sources are likely to be the most accurate, and (b) preventing timing loops*. The NTP protocol achieves these aims by including a simple measure of the synchronisation distance from the primary time source. This is known as the Stratum level.</p></div><div><p>Stratum 1 indicates a computer that has a true real-time reference directly connected to it (e.g. GPS, atomic clock, etc.), such computers are expected to be very close to real time. Stratum 2 computers are those which have a stratum 1 server; stratum 3 computers have a stratum 2 server and so on. A value of 10 indicates that the clock is so many hops away from a reference clock that its time is fairly unreliable.</p></div><div><p></p><div src="markdown/6-deploy-configure-and-maintain-systems/6d-configure-time-service-clients/6d-configure-time-service-clients-3f5d6.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/6-deploy-configure-and-maintain-systems/6d-configure-time-service-clients/6d-configure-time-service-clients-3f5d6.png"></div><p></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Servers and clients" class="heading" id="Servers_and_clients"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Servers and clients<div class="heading-after">...</div></h3><div class="heading-children"><div><p>An NTP server is a source of time information, and an NTP client is a system/device that is attempting to synchronize its clock to a server. Servers can be either a primary or secondary server</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="6.d Configure time service clients" class="heading" id="6.d_Configure_time_service_clients"><div class="heading-before"></div>6.d Configure time service clients<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="NTP Overview" class="heading" id="NTP_Overview"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>NTP Overview<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.</p></div><div><p>NTP synchronizes the clocks of computer systems. It can read the time from a reference source, then transmit the reading to one or more clients and adjust each client clock as required</p></div><div class="heading-wrapper"><h3 data-heading="Stratum" class="heading" id="Stratum"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Stratum<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Large computer networks can have many devices acting as NTP servers. Where multiple NTP sources are available, NTP clients need some way of (a) judging which time sources are likely to be the most accurate, and (b) preventing timing loops*. The NTP protocol achieves these aims by including a simple measure of the synchronisation distance from the primary time source. This is known as the Stratum level.</p></div><div><p>Stratum 1 indicates a computer that has a true real-time reference directly connected to it (e.g. GPS, atomic clock, etc.), such computers are expected to be very close to real time. Stratum 2 computers are those which have a stratum 1 server; stratum 3 computers have a stratum 2 server and so on. A value of 10 indicates that the clock is so many hops away from a reference clock that its time is fairly unreliable.</p></div><div><p></p><div src="markdown/6-deploy-configure-and-maintain-systems/6d-configure-time-service-clients/6d-configure-time-service-clients-3f5d6.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/6-deploy-configure-and-maintain-systems/6d-configure-time-service-clients/6d-configure-time-service-clients-3f5d6.png"></div><p></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Servers and clients" class="heading" id="Servers_and_clients"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Servers and clients<div class="heading-after">...</div></h3><div class="heading-children"><div><p>An NTP server is a source of time information, and an NTP client is a system/device that is attempting to synchronize its clock to a server. Servers can be either a primary or secondary server</p></div><div><ul>
 <li data-line="0">A primary server receives UTC time signals directly from a very accurate source such as an atomic clock or more commonly - a GPS signal source.A secondary server receives its time signal from one or more upstream servers, and distributes its time signals to one or more downstream servers and clients.</li>
 <li data-line="1">Secondary servers are arranged in a strict hierarchy in terms of upstream and downstream, and the stratum terminology is often used to assist in this process.</li>
 </ul></div></div></div><div class="heading-wrapper"><h3 data-heading="127.127.1.0" class="heading" id="127.127.1.0"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>127.127.1.0<div class="heading-after">...</div></h3><div class="heading-children"><div><p>127.127.1.0 is an ntpd-specific way to enable the local refclock driver (note that this is not supported in chrony and it's only here as Reference).</p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Data and Time Commands" class="heading" id="Data_and_Time_Commands"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Data and Time Commands<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="date" class="heading" id="date"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>date<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Display the current time in the given FORMAT, or set the system date.</p></div><div><pre><code>$ date
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class="heading-wrapper"><h1 data-heading="6.e Install and update software packages from Red Hat Network, a remote repository, or from the local file system" class="heading" id="6.e_Install_and_update_software_packages_from_Red_Hat_Network,_a_remote_repository,_or_from_the_local_file_system"><div class="heading-before"></div>6.e Install and update software packages from Red Hat Network, a remote repository, or from the local file system<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Red Hat Package Manager (RPM)" class="heading" id="Red_Hat_Package_Manager_(RPM)"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 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data-heading="6.e Install and update software packages from Red Hat Network, a remote repository, or from the local file system" class="heading" id="6.e_Install_and_update_software_packages_from_Red_Hat_Network,_a_remote_repository,_or_from_the_local_file_system"><div class="heading-before"></div>6.e Install and update software packages from Red Hat Network, a remote repository, or from the local file system<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Red Hat Package Manager (RPM)" class="heading" id="Red_Hat_Package_Manager_(RPM)"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Red Hat Package Manager (RPM)<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Originally how to install software on the RHEL servers, and it's still a way to manage software on the server.<br>
 Flags:</p></div><div><ul>
 <li data-line="0">i- Install</li>
 <li data-line="1">U - Upgrade</li>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="6.f Work with package module streams" class="heading" id="6.f_Work_with_package_module_streams"><div class="heading-before"></div>6.f Work with package module streams<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>RHEL 8 content is distributed through two main repositories: BaseOS and AppStream.  </p></div><div><p><strong>BaseOS</strong></p></div><div><p>Content in the BaseOS repository is intended to provide the core set of the underlying OS functionality that provides the foundation for all installations. This content is available in the RPM format and is subject to support terms similar to those in previous releases of Red Hat Enterprise Linux.  </p></div><div><p><strong>AppStream</strong></p></div><div><p>Content in the AppStream repository includes additional user-space applications, runtime languages, and databases in support of the varied workloads and use cases. Content in AppStream is available in one of two formats - the familiar RPM format and an extension to the RPM format called modules.</p></div><div><p>Components made available as Application Streams can be packaged as modules or RPM packages and are delivered through the AppStream repository in Red Hat Enterprise Linux 8. Each AppStream component has a given life cycle.</p></div><div class="heading-wrapper"><h3 data-heading="Modules" class="heading" id="Modules"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Modules<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Modules allow you to install a specific version and/or type of an application in your system. For example, for 'postgresql' you can choose to install from multiple versions (stream), and client/server type (profile).</p></div><div><pre><code># dnf module list postgresql
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="6.f Work with package module streams" class="heading" id="6.f_Work_with_package_module_streams"><div class="heading-before"></div>6.f Work with package module streams<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Definition" class="heading" id="Definition"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Definition<div class="heading-after">...</div></h2><div class="heading-children"><div><p>RHEL 8 content is distributed through two main repositories: BaseOS and AppStream.  </p></div><div><p><strong>BaseOS</strong></p></div><div><p>Content in the BaseOS repository is intended to provide the core set of the underlying OS functionality that provides the foundation for all installations. This content is available in the RPM format and is subject to support terms similar to those in previous releases of Red Hat Enterprise Linux.  </p></div><div><p><strong>AppStream</strong></p></div><div><p>Content in the AppStream repository includes additional user-space applications, runtime languages, and databases in support of the varied workloads and use cases. Content in AppStream is available in one of two formats - the familiar RPM format and an extension to the RPM format called modules.</p></div><div><p>Components made available as Application Streams can be packaged as modules or RPM packages and are delivered through the AppStream repository in Red Hat Enterprise Linux 8. Each AppStream component has a given life cycle.</p></div><div class="heading-wrapper"><h3 data-heading="Modules" class="heading" id="Modules"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Modules<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Modules allow you to install a specific version and/or type of an application in your system. For example, for 'postgresql' you can choose to install from multiple versions (stream), and client/server type (profile).</p></div><div><pre><code># dnf module list postgresql
 Last metadata expiration check: 0:20:44 ago on Sat 14 Mar 2020 08:59:58 PM UTC.
 CentOS-8 - AppStream
 Name                     Stream              Profiles                        Summary
diff --git a/docs/markdown/6-deploy-configure-and-maintain-systems/6g-modify-the-system-bootloader.html b/docs/markdown/6-deploy-configure-and-maintain-systems/6g-modify-the-system-bootloader.html
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@@ -1,6 +1,8 @@
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class="heading-wrapper"><h1 data-heading="6.g Modify the system bootloader" class="heading" id="6.g_Modify_the_system_bootloader"><div class="heading-before"></div>6.g Modify the system bootloader<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="GRUB2" class="heading" id="GRUB2"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>GRUB2<div class="heading-after">...</div></h2><div class="heading-children"><div><p><a rel="noopener" class="external-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="6.g Modify the system bootloader" class="heading" id="6.g_Modify_the_system_bootloader"><div class="heading-before"></div>6.g Modify the system bootloader<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="GRUB2" class="heading" id="GRUB2"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>GRUB2<div class="heading-after">...</div></h2><div class="heading-children"><div><p><a rel="noopener" class="external-link" href="https://docs.fedoraproject.org/en-US/fedora/rawhide/system-administrators-guide/kernel-module-driver-configuration/Working_with_the_GRUB_2_Boot_Loader/" target="_blank">https://docs.fedoraproject.org/en-US/fedora/rawhide/system-administrators-guide/kernel-module-driver-configuration/Working_with_the_GRUB_2_Boot_Loader/</a></p></div><div><blockquote>
 <p>GRUB 2 reads its configuration from the /boot/grub2/grub.cfg file on traditional BIOS-based machines and from the /boot/efi/EFI/fedora/grub.cfg file on UEFI machines. This file contains menu information.</p>
 <p>The GRUB 2 configuration file, grub.cfg, is generated during installation, or by invoking the /usr/sbin/grub2-mkconfig utility, and is automatically updated by grubby each time a new kernel is installed. When regenerated manually using grub2-mkconfig, the file is generated according to the template files located in /etc/grub.d/, and custom settings in the /etc/default/grub file. Edits of grub.cfg will be lost any time grub2-mkconfig is used to regenerate the file, so care must be taken to reflect any manual changes in /etc/default/grub as well.</p>
 </blockquote></div><div><p><strong>Configuration files:</strong></p></div><div><ul>
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Manage basic networking" class="heading" id="7._Manage_basic_networking"><div class="heading-before"></div>7. Manage basic networking<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
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data-heading="7. Manage basic networking" class="heading" id="7._Manage_basic_networking"><div class="heading-before"></div>7. Manage basic networking<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="7a-configure-ipv4-and-ipv6-addresses.md" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses.html" target="_self" rel="noopener">7.a Configure IPv4 and IPv6 addresses</a></li>
 <li data-line="1"><a class="internal-link" data-href="7b-configure-hostname-resolution.md" href="markdown/7-manage-basic-networking/7b-configure-hostname-resolution.html" target="_self" rel="noopener">7.b Configure hostname resolution</a></li>
 <li data-line="2"><a class="internal-link" data-href="7c-configure-network-services-to-start-automatically-at-boot.md" href="markdown/7-manage-basic-networking/7c-configure-network-services-to-start-automatically-at-boot.html" target="_self" rel="noopener">7.c Configure network services to start automatically at boot</a></li>
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class="heading-wrapper"><h1 data-heading="7.a Configure IPv4 and IPv6 addresses" class="heading" id="7.a_Configure_IPv4_and_IPv6_addresses"><div class="heading-before"></div>7.a Configure IPv4 and IPv6 addresses<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>📌 EXAM TIPs</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="7.a Configure IPv4 and IPv6 addresses" class="heading" id="7.a_Configure_IPv4_and_IPv6_addresses"><div class="heading-before"></div>7.a Configure IPv4 and IPv6 addresses<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>📌 EXAM TIPs</strong></p></div><div><ul>
 <li data-line="0">Check if <code>bash-completion</code> is installed. If it's not, install it</li>
 <li data-line="1">Use <code>man nmcli-examples</code> to get usage examples</li>
 </ul></div><div class="heading-wrapper"><h2 data-heading="Nmcli - NetworkManager Command Line Interface" class="heading" id="Nmcli_-_NetworkManager_Command_Line_Interface"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Nmcli - NetworkManager Command Line Interface<div class="heading-after">...</div></h2><div class="heading-children"><div><p>nmcli is a command-line tool for controlling NetworkManager and reporting network status. Connections are added under the default location '/etc/sysconfig/network-scripts'.</p></div><div><p>Nmcli allows you to use shorthand for the commands:</p></div><div><p></p><div src="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-424ae.png" class="internal-embed media-embed image-embed is-loaded"><img src="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-424ae.png"></div><p></p></div><div class="heading-wrapper"><h3 data-heading="Notes About Making changes" class="heading" id="Notes_About_Making_changes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Notes About Making changes<div class="heading-after">...</div></h3><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="Connection Changes" class="heading" id="Connection_Changes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Connection Changes<div class="heading-after">...</div></h4><div class="heading-children"><div><p>After making changes to a connection (adding IP, removing IP, adding DNS, etc.), you will need to restart the connection (or NetworkManager) for the changes to take effect. There are a few ways you can do that.</p></div><div><p>Restart the connectio with <code>ifup</code> and <code>ifdown</code></p></div><div><pre><code># ifdown [conn-name] ; ifup [conn-name]
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="heading-wrapper"><h1 data-heading="7.b Configure hostname resolution" class="heading" id="7.b_Configure_hostname_resolution"><div class="heading-before"></div>7.b Configure hostname resolution<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Hostname" class="heading" id="Hostname"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Hostname<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="7.b Configure hostname resolution" class="heading" id="7.b_Configure_hostname_resolution"><div class="heading-before"></div>7.b Configure hostname resolution<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Hostname" class="heading" id="Hostname"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Hostname<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">hostnamectl (1)      - Control the system hostname</li>
 <li data-line="1">hostname (1)         - show or set the system's host name</li>
 </ul></div><div><p>Viewing the hostname with 'hostname' - hostname {-f|-s}</p></div><div><pre><code># hostname
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class="heading-wrapper"><h1 data-heading="7.c Configure network services to start automatically at boot" class="heading" id="7.c_Configure_network_services_to_start_automatically_at_boot"><div class="heading-before"></div>7.c Configure network services to start automatically at boot<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Enable a Service to Start on Boot" class="heading" id="Enable_a_Service_to_Start_on_Boot"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Enable a Service to Start on Boot<div class="heading-after">...</div></h2><div class="heading-children"><div><p>As we have seen before, use 'systemctl enable'</p></div><div><pre><code># systemctl enable httpd
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="7.c Configure network services to start automatically at boot" class="heading" id="7.c_Configure_network_services_to_start_automatically_at_boot"><div class="heading-before"></div>7.c Configure network services to start automatically at boot<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Enable a Service to Start on Boot" class="heading" id="Enable_a_Service_to_Start_on_Boot"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Enable a Service to Start on Boot<div class="heading-after">...</div></h2><div class="heading-children"><div><p>As we have seen before, use 'systemctl enable'</p></div><div><pre><code># systemctl enable httpd
 Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service → /usr/lib/systemd/system/httpd.service.
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>Confirmation that it's enabled</p></div><div><pre><code># systemctl status httpd
 ● httpd.service - The Apache HTTP Server
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9-Manage-security</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div 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class="heading-wrapper"><h1 data-heading="7.d Restrict network access using firewall-cmd/firewall" class="heading" id="7.d_Restrict_network_access_using_firewall-cmd/firewall"><div class="heading-before"></div>7.d Restrict network access using firewall-cmd/firewall<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>📝 NOTE:</strong> <em>For firewall configuration with 'firewall-cmd', see "<a class="internal-link" data-href="../9-Manage-security/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables.md" href="markdown/9-manage-security/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables.html" target="_self" rel="noopener">9-Manage security =&gt; Configure firewall settings using firewall-cmd/firewalld</a>"</em></p></div><div><p><strong>Reference:</strong></p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png"><span class="tree-item-title">1d-Access-remote-systems-using-SSH-c3524</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2/image1.png"><span class="tree-item-title">image1</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1g-create-and-edit-text-files</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="7.d Restrict network access using firewall-cmd/firewall" class="heading" id="7.d_Restrict_network_access_using_firewall-cmd/firewall"><div class="heading-before"></div>7.d Restrict network access using firewall-cmd/firewall<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>📝 NOTE:</strong> <em>For firewall configuration with 'firewall-cmd', see "<a class="internal-link" data-href="../9-Manage-security/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables.md" href="markdown/9-manage-security/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables.html" target="_self" rel="noopener">9-Manage security =&gt; Configure firewall settings using firewall-cmd/firewalld</a>"</em></p></div><div><p><strong>Reference:</strong></p></div><div><ul>
 <li data-line="0">firewalld (1)        - Dynamic Firewall Manager</li>
 <li data-line="1">firewall-cmd (1)     - firewalld command line client</li>
 </ul></div><div class="heading-wrapper"><h2 data-heading="Creating a new Zone and Adding Services and Interface" class="heading" id="Creating_a_new_Zone_and_Adding_Services_and_Interface"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Creating a new Zone and Adding Services and Interface<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Create a new zone</p></div><div><pre><code># firewall-cmd --permanent --new-zone=server
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data-heading="8 Manage users and groups" class="heading" id="8_Manage_users_and_groups"><div class="heading-before"></div>8 Manage users and groups<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="8a-Create-delete-and-modify-local-user-accounts.md" href="markdown/8-manage-users-and-groups/8a-create-delete-and-modify-local-user-accounts.html" target="_self" rel="noopener">8.a Create, delete, and modify local user accounts</a></li>
 <li data-line="1"><a class="internal-link" data-href="8b-Change-passwords-and-adjust-password-aging-for-local-user-accounts.md" href="markdown/8-manage-users-and-groups/8b-change-passwords-and-adjust-password-aging-for-local-user-accounts.html" target="_self" rel="noopener">8.b Change passwords and adjust password aging for local user accounts</a></li>
 <li data-line="2"><a class="internal-link" data-href="8c-Create-delete-and-modify-local-groups-and-group-memberships.md" href="markdown/8-manage-users-and-groups/8c-create-delete-and-modify-local-groups-and-group-memberships.html" target="_self" rel="noopener">8.c Create, delete, and modify local groups and group memberships</a></li>
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class="heading-wrapper"><h1 data-heading="8.a Create, delete, and modify local user accounts" class="heading" id="8.a_Create,_delete,_and_modify_local_user_accounts"><div class="heading-before"></div>8.a Create, delete, and modify local user accounts<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Important Files:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="8.a Create, delete, and modify local user accounts" class="heading" id="8.a_Create,_delete,_and_modify_local_user_accounts"><div class="heading-before"></div>8.a Create, delete, and modify local user accounts<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Important Files:</strong></p></div><div><ul>
 <li data-line="0"><code>/etc/skell</code>                       - Skeleton folder</li>
 <li data-line="1"><code>/etc/passwd</code>                  - Password file</li>
 <li data-line="2"><code>/etc/group</code>                     - Group file</li>
diff --git a/docs/markdown/8-manage-users-and-groups/8b-change-passwords-and-adjust-password-aging-for-local-user-accounts.html b/docs/markdown/8-manage-users-and-groups/8b-change-passwords-and-adjust-password-aging-for-local-user-accounts.html
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class="internal-link tree-item-link" href="markdown/8-manage-users-and-groups/8-manage-users-and-groups.html"><span class="tree-item-title">8-Manage-users-and-groups</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/8-manage-users-and-groups/8a-create-delete-and-modify-local-user-accounts.html"><span class="tree-item-title">8a-Create-delete-and-modify-local-user-accounts</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/8-manage-users-and-groups/8b-change-passwords-and-adjust-password-aging-for-local-user-accounts.html"><span class="tree-item-title">8b-Change-passwords-and-adjust-password-aging-for-local-user-accounts</span></a></div><div class="tree-item-children"></div></div><div 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fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9-Manage-security</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div 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class="heading-wrapper"><h1 data-heading="8.b Change passwords and adjust password aging for local user accounts" class="heading" id="8.b_Change_passwords_and_adjust_password_aging_for_local_user_accounts"><div class="heading-before"></div>8.b Change passwords and adjust password aging for local user accounts<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Commands" class="heading" id="Commands"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Commands<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="passwd" class="heading" id="passwd"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>passwd<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Change users password. Only root can change the password for another user.  </p></div></div></div><div class="heading-wrapper"><h3 data-heading="chage" class="heading" id="chage"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>chage<div class="heading-after">...</div></h3><div class="heading-children"><div><p>chage - Change user password expiry information</p></div><div><p>Common options:</p></div><div><ul>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="8.b Change passwords and adjust password aging for local user accounts" class="heading" id="8.b_Change_passwords_and_adjust_password_aging_for_local_user_accounts"><div class="heading-before"></div>8.b Change passwords and adjust password aging for local user accounts<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Commands" class="heading" id="Commands"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Commands<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="passwd" class="heading" id="passwd"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>passwd<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Change users password. Only root can change the password for another user.  </p></div></div></div><div class="heading-wrapper"><h3 data-heading="chage" class="heading" id="chage"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>chage<div class="heading-after">...</div></h3><div class="heading-children"><div><p>chage - Change user password expiry information</p></div><div><p>Common options:</p></div><div><ul>
 <li data-line="0"><code>d</code> - Set date of last password change to <code>LAST_DAY</code></li>
 <li data-line="1"><code>E</code> - Set the account to expire on date</li>
 <li data-line="2"><code>M</code> - Maximum days the password will be valid for</li>
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class="heading-wrapper"><h1 data-heading="8.c Create, delete, and modify local groups and group memberships" class="heading" id="8.c_Create,_delete,_and_modify_local_groups_and_group_memberships"><div class="heading-before"></div>8.c Create, delete, and modify local groups and group memberships<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Example Commands" class="heading" id="Example_Commands"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Example Commands<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Getting Group Information" class="heading" id="Getting_Group_Information"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Getting Group Information<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Get user's group</p></div><div><pre><code>$ id user2
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="8.c Create, delete, and modify local groups and group memberships" class="heading" id="8.c_Create,_delete,_and_modify_local_groups_and_group_memberships"><div class="heading-before"></div>8.c Create, delete, and modify local groups and group memberships<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Example Commands" class="heading" id="Example_Commands"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Example Commands<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Getting Group Information" class="heading" id="Getting_Group_Information"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Getting Group Information<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Get user's group</p></div><div><pre><code>$ id user2
 uid=1002(user2) gid=1002(user2) groups=1002(user2),100(users)
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>Or</p></div><div><pre><code>$ groups
 user2 users
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class="heading-wrapper"><h1 data-heading="8.d Configure superuser access" class="heading" id="8.d_Configure_superuser_access"><div class="heading-before"></div>8.d Configure superuser access<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="8.d Configure superuser access" class="heading" id="8.d_Configure_superuser_access"><div class="heading-before"></div>8.d Configure superuser access<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">visudo (8)           - edit the sudoers file</li>
 <li data-line="1">sudoers (5)          - default sudo security policy plugin</li>
 </ul></div><div><p><strong>Files:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9. Manage security" class="heading" id="9._Manage_security"><div class="heading-before"></div>9. Manage security<div class="heading-after">...</div></h1><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables.md" href="markdown/9-manage-security/9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables.html" target="_self" rel="noopener">9.a Configure firewall settings using firewall-config, firewall-cmd, or iptables</a></li>
 <li data-line="1"><a class="internal-link" data-href="9b-RHEL8-create-and-use-file-access-control-lists.md" href="markdown/9-manage-security/9b-rhel8-create-and-use-file-access-control-lists.html" target="_self" rel="noopener">9.b.RHEL8 Create and use file access control lists</a></li>
 <li data-line="2"><a class="internal-link" data-href="9b-RHEL9-manage-default-file-permissions.md" href="markdown/9-manage-security/9b-rhel9-manage-default-file-permissions.html" target="_self" rel="noopener">9.b.RHEL9 Manage default file permissions</a></li>
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class="heading-wrapper"><h1 data-heading="9.a Configure firewall settings using firewall-config, firewall-cmd, or iptables" class="heading" id="9.a_Configure_firewall_settings_using_firewall-config,_firewall-cmd,_or_iptables"><div class="heading-before"></div>9.a Configure firewall settings using firewall-config, firewall-cmd, or iptables<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="IPv4 Forwarding" class="heading" id="IPv4_Forwarding"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>IPv4 Forwarding<div class="heading-after">...</div></h2><div class="heading-children"><div><p>I'm not sure why this is a topic that is covered on many online and study sources, but it appears that enabling IP forwarding is part of the RHCSA exam, even thou it's not listed in the exam objectives (it may be left over from RHCSA v7 exam).  </p></div><div><p>Enabling IP forwarding is something that you would on a router, or potentially on a VPN server. It allows incoming traffic directed to a different IP to flow through the configured interface. With firewalld enabled, you would also need to configure rules for this to work.  </p></div><div class="heading-wrapper"><h3 data-heading="Enabling IPv4 Forwarding" class="heading" id="Enabling_IPv4_Forwarding"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Enabling IPv4 Forwarding<div class="heading-after">...</div></h3><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="Runtime" class="heading" id="Runtime"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Runtime<div class="heading-after">...</div></h4><div class="heading-children"><div><pre><code># sysctl -w net.ipv4.ip_forward=1
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.a Configure firewall settings using firewall-config, firewall-cmd, or iptables" class="heading" id="9.a_Configure_firewall_settings_using_firewall-config,_firewall-cmd,_or_iptables"><div class="heading-before"></div>9.a Configure firewall settings using firewall-config, firewall-cmd, or iptables<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="IPv4 Forwarding" class="heading" id="IPv4_Forwarding"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>IPv4 Forwarding<div class="heading-after">...</div></h2><div class="heading-children"><div><p>I'm not sure why this is a topic that is covered on many online and study sources, but it appears that enabling IP forwarding is part of the RHCSA exam, even thou it's not listed in the exam objectives (it may be left over from RHCSA v7 exam).  </p></div><div><p>Enabling IP forwarding is something that you would on a router, or potentially on a VPN server. It allows incoming traffic directed to a different IP to flow through the configured interface. With firewalld enabled, you would also need to configure rules for this to work.  </p></div><div class="heading-wrapper"><h3 data-heading="Enabling IPv4 Forwarding" class="heading" id="Enabling_IPv4_Forwarding"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Enabling IPv4 Forwarding<div class="heading-after">...</div></h3><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="Runtime" class="heading" id="Runtime"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Runtime<div class="heading-after">...</div></h4><div class="heading-children"><div><pre><code># sysctl -w net.ipv4.ip_forward=1
 net.ipv4.ip_forward = 1
 </code><button class="copy-code-button">Copy</button></pre></div></div></div><div class="heading-wrapper"><h4 data-heading="Permanent" class="heading" id="Permanent"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Permanent<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Add 'net.ipv4.ip_forward = 1' to '/etc/sysctl.conf</p></div><div><p>Load sysctl</p></div><div><pre><code># sysctl -p
 net.ipv4.ip_forward = 1
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="heading-wrapper"><h1 data-heading="9.b Create and use file access control lists" class="heading" id="9.b_Create_and_use_file_access_control_lists"><div class="heading-before"></div>9.b Create and use file access control lists<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="ACLS" class="heading" id="ACLS"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>ACLS<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.b Create and use file access control lists" class="heading" id="9.b_Create_and_use_file_access_control_lists"><div class="heading-before"></div>9.b Create and use file access control lists<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="ACLS" class="heading" id="ACLS"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>ACLS<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">acl (5)              - Access Control Lists</li>
 <li data-line="1">getfacl (1)          - get file access control lists</li>
 <li data-line="2">setfacl (1)          - set file access control lists</li>
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class="heading-wrapper"><h1 data-heading="9.c Manage default file permissions" class="heading" id="9.c_Manage_default_file_permissions"><div class="heading-before"></div>9.c Manage default file permissions<div class="heading-after">...</div></h1><div class="heading-children"><div><p><em>This topic includes:</em></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.c Manage default file permissions" class="heading" id="9.c_Manage_default_file_permissions"><div class="heading-before"></div>9.c Manage default file permissions<div class="heading-after">...</div></h1><div class="heading-children"><div><p><em>This topic includes:</em></p></div><div><ul>
 <li data-line="0">System base file permissions</li>
 <li data-line="1">Change default file permissions</li>
 <li data-line="2">Inspect file permissions</li>
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class="heading-wrapper"><h1 data-heading="9.c Configure key-based authentication for SSH" class="heading" id="9.c_Configure_key-based_authentication_for_SSH"><div class="heading-before"></div>9.c Configure key-based authentication for SSH<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Overview of SSH" class="heading" id="Overview_of_SSH"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Overview of SSH<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Packages</strong></p></div><div><ul>
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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.c Configure key-based authentication for SSH" class="heading" id="9.c_Configure_key-based_authentication_for_SSH"><div class="heading-before"></div>9.c Configure key-based authentication for SSH<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Overview of SSH" class="heading" id="Overview_of_SSH"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Overview of SSH<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Packages</strong></p></div><div><ul>
 <li data-line="0">openssh-server</li>
 <li data-line="1">openssh-clients</li>
 </ul></div><div><p><strong>Service</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.d Set enforcing and permissive modes for SELinux" class="heading" id="9.d_Set_enforcing_and_permissive_modes_for_SELinux"><div class="heading-before"></div>9.d Set enforcing and permissive modes for SELinux<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">selinux (8) - NSA Security-Enhanced Linux (SELinux)</li>
 <li data-line="1">sestatus (8) - SELinux status tool</li>
 <li data-line="2">setenforce (8) - modify the mode SELinux is running in</li>
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class="heading-wrapper"><h1 data-heading="9.e List and identify SELinux file and process context" class="heading" id="9.e_List_and_identify_SELinux_file_and_process_context"><div class="heading-before"></div>9.e List and identify SELinux file and process context<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.e List and identify SELinux file and process context" class="heading" id="9.e_List_and_identify_SELinux_file_and_process_context"><div class="heading-before"></div>9.e List and identify SELinux file and process context<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Commands:</strong></p></div><div><ul>
 <li data-line="0">ls (1)               - list directory contents</li>
 <li data-line="1">secon (1)            - See an SELinux context, from a file, program or user input.</li>
 </ul></div><div class="heading-wrapper"><h2 data-heading="SELinux Contexts" class="heading" id="SELinux_Contexts"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>SELinux Contexts<div class="heading-after">...</div></h2><div class="heading-children"><div><p>All files, directories, devices have a security context/label associated with them.   These context  are stored in the extended attributes of the file system.  </p></div><div class="heading-wrapper"><h3 data-heading="List All Contexts" class="heading" id="List_All_Contexts"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>List All Contexts<div class="heading-after">...</div></h3><div class="heading-children"><div><pre><code># semanage fcontext -l
diff --git a/docs/markdown/9-manage-security/9ex-rhel9-manage-selinux-ports.html b/docs/markdown/9-manage-security/9ex-rhel9-manage-selinux-ports.html
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.e Manage SELinux port labels" class="heading" id="9.e_Manage_SELinux_port_labels"><div class="heading-before"></div>9.e Manage SELinux port labels<div class="heading-after">...</div></h1><div class="heading-children"><div><p>One way in which SELinux secures the systen is by monitoring ports. Specifically, it monitors the name of the processes which are running on each port and determines their SELinux Port Type. If the specified port is not in the list (nonstandard), that process is blocked.</p></div><div><p><em>This topic includes:</em></p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.e Manage SELinux port labels" class="heading" id="9.e_Manage_SELinux_port_labels"><div class="heading-before"></div>9.e Manage SELinux port labels<div class="heading-after">...</div></h1><div class="heading-children"><div><p>One way in which SELinux secures the systen is by monitoring ports. Specifically, it monitors the name of the processes which are running on each port and determines their SELinux Port Type. If the specified port is not in the list (nonstandard), that process is blocked.</p></div><div><p><em>This topic includes:</em></p></div><div><ul>
 <li data-line="0">Configuring SELinux port labels</li>
 <li data-line="1">Short tcp, udp explanation</li>
 <li data-line="2">Port label example</li>
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class="heading-wrapper"><h1 data-heading="9.f Restore default file contexts" class="heading" id="9.f_Restore_default_file_contexts"><div class="heading-before"></div>9.f Restore default file contexts<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Changing SELinux Context" class="heading" id="Changing_SELinux_Context"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Changing SELinux Context<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Temporarily Changing Context" class="heading" id="Temporarily_Changing_Context"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Temporarily Changing Context<div class="heading-after">...</div></h3><div class="heading-children"><div><p>You can use <code>chcon</code> to temporarily change the context of files.  </p></div><div><p><strong>⚠️ WARNING:</strong> <em>Changes with <code>chcon</code> will not survive <code>restorecon</code> or system relabel.</em></p></div><div><p>Changing the context of a file</p></div><div><pre><code># chcon unconfined_u:object_r:tmp_t:s0 test_file.txt
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.f Restore default file contexts" class="heading" id="9.f_Restore_default_file_contexts"><div class="heading-before"></div>9.f Restore default file contexts<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Changing SELinux Context" class="heading" id="Changing_SELinux_Context"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Changing SELinux Context<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Temporarily Changing Context" class="heading" id="Temporarily_Changing_Context"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Temporarily Changing Context<div class="heading-after">...</div></h3><div class="heading-children"><div><p>You can use <code>chcon</code> to temporarily change the context of files.  </p></div><div><p><strong>⚠️ WARNING:</strong> <em>Changes with <code>chcon</code> will not survive <code>restorecon</code> or system relabel.</em></p></div><div><p>Changing the context of a file</p></div><div><pre><code># chcon unconfined_u:object_r:tmp_t:s0 test_file.txt
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>Changing just the context type of a file</p></div><div><pre><code># chcon -t [context_type] [file]
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>For example</p></div><div><pre><code># ls -lZ /tmp/test
 -rw-r--r--. 1 root root unconfined_u:object_r:user_tmp_t:s0 403 Dec  1 13:48 /tmp/test
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.g Use boolean settings to modify system SELinux settings" class="heading" id="9.g_Use_boolean_settings_to_modify_system_SELinux_settings"><div class="heading-before"></div>9.g Use boolean settings to modify system SELinux settings<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="SELinux Booleans" class="heading" id="SELinux_Booleans"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>SELinux Booleans<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Booleans are on/off settings for functions in SELinux. There are hundreds of settings that can turn SELinux capabilities on or off, and many are already predefined.  </p></div><div class="heading-wrapper"><h3 data-heading="Listing Booleans" class="heading" id="Listing_Booleans"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Listing Booleans<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Use 'getsebool' to get current booleans and their values.</p></div><div><p>Get status on a specific boolean</p></div><div><pre><code># getsebool httpd_enable_cgi
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.g Use boolean settings to modify system SELinux settings" class="heading" id="9.g_Use_boolean_settings_to_modify_system_SELinux_settings"><div class="heading-before"></div>9.g Use boolean settings to modify system SELinux settings<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="SELinux Booleans" class="heading" id="SELinux_Booleans"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>SELinux Booleans<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Booleans are on/off settings for functions in SELinux. There are hundreds of settings that can turn SELinux capabilities on or off, and many are already predefined.  </p></div><div class="heading-wrapper"><h3 data-heading="Listing Booleans" class="heading" id="Listing_Booleans"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Listing Booleans<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Use 'getsebool' to get current booleans and their values.</p></div><div><p>Get status on a specific boolean</p></div><div><pre><code># getsebool httpd_enable_cgi
 httpd_enable_cgi --&gt; on
 </code><button class="copy-code-button">Copy</button></pre></div><div><p>List all booleans  </p></div><div><pre><code># getsebool -a | head -n 4
 abrt_anon_write --&gt; off
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class="heading-wrapper"><h1 data-heading="9.h Diagnose and address routine SELinux policy violations" class="heading" id="9.h_Diagnose_and_address_routine_SELinux_policy_violations"><div class="heading-before"></div>9.h Diagnose and address routine SELinux policy violations<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Troubleshooting SELinux Issues" class="heading" id="Troubleshooting_SELinux_Issues"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Troubleshooting SELinux Issues<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Sealert (setroubleshoot)" class="heading" id="Sealert_(setroubleshoot)"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Sealert (setroubleshoot)<div class="heading-after">...</div></h3><div class="heading-children"><div><p><code>sealert</code> is the user interface component (either GUI or command line) to the setroubleshoot system. setroubleshoot is used to diagnose SELinux denials and attempts to provide  user  friendly explanations  for  a SELinux denial (e.g. AVC) and recommendations for how one might adjust the system to prevent the denial in the future.</p></div><div><p>Requires the packages:</p></div><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="9.h Diagnose and address routine SELinux policy violations" class="heading" id="9.h_Diagnose_and_address_routine_SELinux_policy_violations"><div class="heading-before"></div>9.h Diagnose and address routine SELinux policy violations<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Troubleshooting SELinux Issues" class="heading" id="Troubleshooting_SELinux_Issues"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Troubleshooting SELinux Issues<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Sealert (setroubleshoot)" class="heading" id="Sealert_(setroubleshoot)"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Sealert (setroubleshoot)<div class="heading-after">...</div></h3><div class="heading-children"><div><p><code>sealert</code> is the user interface component (either GUI or command line) to the setroubleshoot system. setroubleshoot is used to diagnose SELinux denials and attempts to provide  user  friendly explanations  for  a SELinux denial (e.g. AVC) and recommendations for how one might adjust the system to prevent the denial in the future.</p></div><div><p>Requires the packages:</p></div><div><ul>
 <li data-line="0">setroubleshoot-server</li>
 <li data-line="1">setroubleshoot-plugins</li>
 </ul></div><div><p><strong>📌 EXAM TIP:</strong> <em>Use <code>dnf provides sealert</code> if you can't remember the package name</em></p></div><div><p>You can ask <code>sealert</code> to analyze errors in a log file</p></div><div><pre><code># sealert -a /var/log/audit/audit.log  
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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="Additional Resouces" class="heading" id="Additional_Resouces"><div class="heading-before"></div>Additional Resouces<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Videos" class="heading" id="Videos"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Videos<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Computers, Security &amp; Gadgets has compiled an amazing content for the RHCSA v8 exam. There are a total of 68 videos that cover all the objectives for the exam. This is a must for anyone preparing for the exam.</p></div><div><p><a data-tooltip-position="top" aria-label="https://www.youtube.com/playlist?list=PLsSTa0x6YacC2jNX9iV1ukbA8g4mcTfdE" rel="noopener" class="external-link" href="https://www.youtube.com/playlist?list=PLsSTa0x6YacC2jNX9iV1ukbA8g4mcTfdE" target="_blank">RHCSA RHEL 8 - (Red Hat Certified System Administrator) - YouTube</a></p></div></div></div><div class="heading-wrapper"><h2 data-heading="Chats" class="heading" id="Chats"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Chats<div class="heading-after">...</div></h2><div class="heading-children"><div><p>These are Red Hat certification study chat groups that can greatly help you with your study and any questions you might have.</p></div><div class="heading-wrapper"><h4 data-heading="Slack - Red Hat Certs" class="heading" id="Slack_-_Red_Hat_Certs"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Slack - Red Hat Certs<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a rel="noopener" class="external-link" href="https://redhat-certs.slack.com/" target="_blank">https://redhat-certs.slack.com/</a></p></div><div><p>This study group was created by rd.break and has almost 4k users. The group includes separate channels for RHCSA, RHCE and RHCA.</p></div></div></div><div class="heading-wrapper"><h4 data-heading="Discord - Computers, Security &amp; Gadgets" class="heading" id="Discord_-_Computers,_Security_&amp;_Gadgets"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Discord - Computers, Security &amp; Gadgets<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Invite Link - <a rel="noopener" class="external-link" href="https://discord.com/invite/kBQ6Jry" target="_blank">https://discord.com/invite/kBQ6Jry</a></p></div><div><p>This another group, created by 'Computers, Security &amp; Gadgets', that aims to help on the videos as well as study content for the RHCSA exam.</p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Environments" class="heading" id="Environments"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Environments<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Virtualized environments with Red Hat Enterprise 8 that you can use to practice everything that you will learn.</p></div><div class="heading-wrapper"><h4 data-heading="Official VirtualBox Install from Red Hat" class="heading" id="Official_VirtualBox_Install_from_Red_Hat"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Official VirtualBox Install from Red Hat<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://developers.redhat.com/rhel8/install-rhel8-vbox" rel="noopener" class="external-link" href="https://developers.redhat.com/rhel8/install-rhel8-vbox" target="_blank">RHEL 8 VirtualBox Quick Install</a></p></div><div><p>Official guide from Red Hat on installing RHEL 8 with a Developer subscription on VirtualBox.</p></div></div></div><div class="heading-wrapper"><h4 data-heading="Vagrant Boxes" class="heading" id="Vagrant_Boxes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Vagrant Boxes<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://app.vagrantup.com/boxes/search?utf8=%E2%9C%93&amp;sort=downloads&amp;provider=&amp;q=rhel8" rel="noopener" class="external-link" href="https://app.vagrantup.com/boxes/search?utf8=%E2%9C%93&amp;sort=downloads&amp;provider=&amp;q=rhel8" target="_blank">Vagrant Cloud</a></p></div><div><p>You can use existing pre-built images from Vagrant Cloud.</p></div><div><p><strong>📌 TIP:</strong> <em>After you build the box, you can also subscribe to a Red Hat developer subscription so you can run 'dnf' (and many other commands)</em></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Labs" class="heading" id="Labs"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Labs<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="RHCSA 8 Automated Practice Deployment" class="heading" id="RHCSA_8_Automated_Practice_Deployment"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>RHCSA 8 Automated Practice Deployment<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://github.com/rdbreak/rhcsa8env" rel="noopener" class="external-link" href="https://github.com/rdbreak/rhcsa8env" target="_blank">GitHub - rdbreak/rhcsa8env</a></p></div><div><p>This is a RHCSA8 study environment built with Vagrant/Ansible.</p></div><div><p>The aim is to have a reusable exam environment to take different practice exams without having to build it up manually every time.</p></div></div></div><div class="heading-wrapper"><h4 data-heading="RHCSA 8 Lab environment" class="heading" id="RHCSA_8_Lab_environment"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>RHCSA 8 Lab environment<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://github.com/johnrwhitaker/rhcsa8lab" rel="noopener" class="external-link" href="https://github.com/johnrwhitaker/rhcsa8lab" target="_blank">GitHub - johnrwhitaker/rhcsa8lab</a></p></div><div><p>RHCSA 8 Lab environment. Powered by Ansible, Vagrant &amp; VirtualBox</p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Practice Questions" class="heading" id="Practice_Questions"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Practice Questions<div class="heading-after">...</div></h2><div class="heading-children"><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="Additional Resouces" class="heading" id="Additional_Resouces"><div class="heading-before"></div>Additional Resouces<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="Videos" class="heading" id="Videos"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Videos<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Computers, Security &amp; Gadgets has compiled an amazing content for the RHCSA v8 exam. There are a total of 68 videos that cover all the objectives for the exam. This is a must for anyone preparing for the exam.</p></div><div><p><a data-tooltip-position="top" aria-label="https://www.youtube.com/playlist?list=PLsSTa0x6YacC2jNX9iV1ukbA8g4mcTfdE" rel="noopener" class="external-link" href="https://www.youtube.com/playlist?list=PLsSTa0x6YacC2jNX9iV1ukbA8g4mcTfdE" target="_blank">RHCSA RHEL 8 - (Red Hat Certified System Administrator) - YouTube</a></p></div></div></div><div class="heading-wrapper"><h2 data-heading="Chats" class="heading" id="Chats"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Chats<div class="heading-after">...</div></h2><div class="heading-children"><div><p>These are Red Hat certification study chat groups that can greatly help you with your study and any questions you might have.</p></div><div class="heading-wrapper"><h4 data-heading="Slack - Red Hat Certs" class="heading" id="Slack_-_Red_Hat_Certs"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Slack - Red Hat Certs<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a rel="noopener" class="external-link" href="https://redhat-certs.slack.com/" target="_blank">https://redhat-certs.slack.com/</a></p></div><div><p>This study group was created by rd.break and has almost 4k users. The group includes separate channels for RHCSA, RHCE and RHCA.</p></div></div></div><div class="heading-wrapper"><h4 data-heading="Discord - Computers, Security &amp; Gadgets" class="heading" id="Discord_-_Computers,_Security_&amp;_Gadgets"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Discord - Computers, Security &amp; Gadgets<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Invite Link - <a rel="noopener" class="external-link" href="https://discord.com/invite/kBQ6Jry" target="_blank">https://discord.com/invite/kBQ6Jry</a></p></div><div><p>This another group, created by 'Computers, Security &amp; Gadgets', that aims to help on the videos as well as study content for the RHCSA exam.</p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Environments" class="heading" id="Environments"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Environments<div class="heading-after">...</div></h2><div class="heading-children"><div><p>Virtualized environments with Red Hat Enterprise 8 that you can use to practice everything that you will learn.</p></div><div class="heading-wrapper"><h4 data-heading="Official VirtualBox Install from Red Hat" class="heading" id="Official_VirtualBox_Install_from_Red_Hat"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Official VirtualBox Install from Red Hat<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://developers.redhat.com/rhel8/install-rhel8-vbox" rel="noopener" class="external-link" href="https://developers.redhat.com/rhel8/install-rhel8-vbox" target="_blank">RHEL 8 VirtualBox Quick Install</a></p></div><div><p>Official guide from Red Hat on installing RHEL 8 with a Developer subscription on VirtualBox.</p></div></div></div><div class="heading-wrapper"><h4 data-heading="Vagrant Boxes" class="heading" id="Vagrant_Boxes"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Vagrant Boxes<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://app.vagrantup.com/boxes/search?utf8=%E2%9C%93&amp;sort=downloads&amp;provider=&amp;q=rhel8" rel="noopener" class="external-link" href="https://app.vagrantup.com/boxes/search?utf8=%E2%9C%93&amp;sort=downloads&amp;provider=&amp;q=rhel8" target="_blank">Vagrant Cloud</a></p></div><div><p>You can use existing pre-built images from Vagrant Cloud.</p></div><div><p><strong>📌 TIP:</strong> <em>After you build the box, you can also subscribe to a Red Hat developer subscription so you can run 'dnf' (and many other commands)</em></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Labs" class="heading" id="Labs"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Labs<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="RHCSA 8 Automated Practice Deployment" class="heading" id="RHCSA_8_Automated_Practice_Deployment"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>RHCSA 8 Automated Practice Deployment<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://github.com/rdbreak/rhcsa8env" rel="noopener" class="external-link" href="https://github.com/rdbreak/rhcsa8env" target="_blank">GitHub - rdbreak/rhcsa8env</a></p></div><div><p>This is a RHCSA8 study environment built with Vagrant/Ansible.</p></div><div><p>The aim is to have a reusable exam environment to take different practice exams without having to build it up manually every time.</p></div></div></div><div class="heading-wrapper"><h4 data-heading="RHCSA 8 Lab environment" class="heading" id="RHCSA_8_Lab_environment"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>RHCSA 8 Lab environment<div class="heading-after">...</div></h4><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://github.com/johnrwhitaker/rhcsa8lab" rel="noopener" class="external-link" href="https://github.com/johnrwhitaker/rhcsa8lab" target="_blank">GitHub - johnrwhitaker/rhcsa8lab</a></p></div><div><p>RHCSA 8 Lab environment. Powered by Ansible, Vagrant &amp; VirtualBox</p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Practice Questions" class="heading" id="Practice_Questions"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Practice Questions<div class="heading-after">...</div></h2><div class="heading-children"><div><ul>
 <li data-line="0"><a data-tooltip-position="top" aria-label="https://github.com/chlebik/rhcsa-practice-questions/tree/master/questions" rel="noopener" class="external-link" href="https://github.com/chlebik/rhcsa-practice-questions/tree/master/questions" target="_blank">rhcsa-practice-questions · GitHub</a></li>
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Gadgets</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Environments"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>Environments</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Official_VirtualBox_Install_from_Red_Hat"><span class="tree-item-title"><p>Official VirtualBox Install from Red Hat</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Vagrant_Boxes"><span class="tree-item-title"><p>Vagrant Boxes</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Labs"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>Labs</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#RHCSA_8_Automated_Practice_Deployment"><span class="tree-item-title"><p>RHCSA 8 Automated Practice Deployment</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#RHCSA_8_Lab_environment"><span class="tree-item-title"><p>RHCSA 8 Lab environment</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Practice_Questions"><span class="tree-item-title"><p>Practice Questions</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
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+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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data-heading="Exam Format" class="heading" id="Exam_Format"><div class="heading-before"></div>Exam Format<div class="heading-after">...</div></h1><div class="heading-children"><div><p><strong>Duration:</strong> 3 hours</p></div><div><p><strong>Cost:</strong> $400 USD</p></div><div><p><strong>Exam Types:</strong></p></div><div><ul>
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class="heading-wrapper"><h1 data-heading="Objectives" class="heading" id="Objectives"><div class="heading-before"></div>Objectives<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam?section=Objectives#Objectives" rel="noopener" class="external-link" href="https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam?section=Objectives#Objectives" target="_blank">Red Hat Certified System Administrator (RHCSA) exam - EX200</a></p></div><div class="heading-wrapper"><h2 data-heading="Study points for the exam." class="heading" id="Study_points_for_the_exam."><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Study points for the exam.<div class="heading-after">...</div></h2><div class="heading-children"><div><p>RHCSA exam candidates should be able to accomplish the tasks below without assistance. These have been grouped into several categories.</p></div><div><p><strong>📝 NOTE:</strong> <em>The first few objectives are currently a bit crude with very short info. Feel free to add your study notes and help improve the documentation.</em></p></div><div class="heading-wrapper"><h3 data-heading="[1. Understand and use essential tools](1-Understand-and-use-essential-tools/1-Understand-and-use-essential-tools.md)" class="heading" id="[1._Understand_and_use_essential_tools](1-Understand-and-use-essential-tools/1-Understand-and-use-essential-tools.md)"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div><a class="internal-link" data-href="1-Understand-and-use-essential-tools/1-Understand-and-use-essential-tools.md" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html" target="_self" rel="noopener">1. Understand and use essential tools</a><div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item 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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="tree-item-title">7-manage-basic-networking</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">7a-configure-ipv4-and-ipv6-addresses</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7a-configure-ipv4-and-ipv6-addresses/7a-configure-ipv4-and-ipv6-addresses-0546b.png"><span 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class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/7-manage-basic-networking/7d-restrict-network-access-using-firewall-cmd-firewall.html"><span class="tree-item-title">7d-restrict-network-access-using-firewall-cmd-firewall</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">8-Manage-users-and-groups</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/8-manage-users-and-groups/8-manage-users-and-groups.html"><span class="tree-item-title">8-Manage-users-and-groups</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/8-manage-users-and-groups/8a-create-delete-and-modify-local-user-accounts.html"><span class="tree-item-title">8a-Create-delete-and-modify-local-user-accounts</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/8-manage-users-and-groups/8b-change-passwords-and-adjust-password-aging-for-local-user-accounts.html"><span class="tree-item-title">8b-Change-passwords-and-adjust-password-aging-for-local-user-accounts</span></a></div><div class="tree-item-children"></div></div><div 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fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9-Manage-security</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">9a-configure-firewall-settings-using-firewall-config-firewall-cmd-or-iptables</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div 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class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/exam-format.html"><span class="tree-item-title">Exam-Format</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/objectives.html"><span class="tree-item-title">Objectives</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/rules.html"><span class="tree-item-title">Rules</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="readme.html"><span class="tree-item-title">README</span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="Objectives" class="heading" id="Objectives"><div class="heading-before"></div>Objectives<div class="heading-after">...</div></h1><div class="heading-children"><div><p><a data-tooltip-position="top" aria-label="https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam?section=Objectives#Objectives" rel="noopener" class="external-link" href="https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam?section=Objectives#Objectives" target="_blank">Red Hat Certified System Administrator (RHCSA) exam - EX200</a></p></div><div class="heading-wrapper"><h2 data-heading="Study points for the exam." class="heading" id="Study_points_for_the_exam."><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Study points for the exam.<div class="heading-after">...</div></h2><div class="heading-children"><div><p>RHCSA exam candidates should be able to accomplish the tasks below without assistance. These have been grouped into several categories.</p></div><div><p><strong>📝 NOTE:</strong> <em>The first few objectives are currently a bit crude with very short info. Feel free to add your study notes and help improve the documentation.</em></p></div><div class="heading-wrapper"><h3 data-heading="[1. Understand and use essential tools](1-Understand-and-use-essential-tools/1-Understand-and-use-essential-tools.md)" class="heading" id="[1._Understand_and_use_essential_tools](1-Understand-and-use-essential-tools/1-Understand-and-use-essential-tools.md)"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div><a class="internal-link" data-href="1-Understand-and-use-essential-tools/1-Understand-and-use-essential-tools.md" href="markdown/1-understand-and-use-essential-tools/1-understand-and-use-essential-tools.html" target="_self" rel="noopener">1. Understand and use essential tools</a><div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
 <li data-line="0"><a class="internal-link" data-href="1-Understand-and-use-essential-tools/1a-Access-a-shell-prompt-and-issue-commands-with-correct-syntax.md" href="markdown/1-understand-and-use-essential-tools/1a-access-a-shell-prompt-and-issue-commands-with-correct-syntax.html" target="_self" rel="noopener">1.a Access a shell prompt and issue commands with correct syntax</a></li>
 <li data-line="1"><a class="internal-link" data-href="1-Understand-and-use-essential-tools/1b-Use-input-output-redirection.md" href="markdown/1-understand-and-use-essential-tools/1b-use-input-output-redirection.html" target="_self" rel="noopener">1.b Use input-output redirection (&gt;, &gt;&gt;, |, 2&gt;, etc.)</a></li>
 <li data-line="2"><a class="internal-link" data-href="1-Understand-and-use-essential-tools/1c-Use-grep-and-regular-expressions-to-analyze-text.md" href="markdown/1-understand-and-use-essential-tools/1c-use-grep-and-regular-expressions-to-analyze-text.html" target="_self" rel="noopener">1.c Use grep and regular expressions to analyze text</a></li>
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-			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="heading-wrapper"><h1 data-heading="Rules and FAQ" class="heading" id="Rules_and_FAQ"><div class="heading-before"></div>Rules and FAQ<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="FAQ:" class="heading" id="FAQ:"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>FAQ:<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="What exam version does the study covers?" class="heading" id="What_exam_version_does_the_study_covers?"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator 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8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" 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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="Rules and FAQ" class="heading" id="Rules_and_FAQ"><div class="heading-before"></div>Rules and FAQ<div class="heading-after">...</div></h1><div class="heading-children"><div class="heading-wrapper"><h2 data-heading="FAQ:" class="heading" id="FAQ:"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>FAQ:<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h4 data-heading="What exam version does the study covers?" class="heading" id="What_exam_version_does_the_study_covers?"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>What exam version does the study covers?<div class="heading-after">...</div></h4><div class="heading-children"><div><ul>
 <li data-line="0">RHCSA v8 with container objectives.</li>
 <li data-line="1">RHCSA v9</li>
 </ul></div></div></div><div class="heading-wrapper"><h4 data-heading="Who can edit this project?" class="heading" id="Who_can_edit_this_project?"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Who can edit this project?<div class="heading-after">...</div></h4><div class="heading-children"><div><p>Anyone is welcome to edit the content</p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Rules" class="heading" id="Rules"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rules<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="1. Make sure to follow Red Hat's NDA" class="heading" id="1._Make_sure_to_follow_Red_Hat's_NDA"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>1. Make sure to follow Red Hat's NDA<div class="heading-after">...</div></h3><div class="heading-children"></div></div><div class="heading-wrapper"><h3 data-heading="2. Behaviour" class="heading" id="2._Behaviour"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>2. Behaviour<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
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class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" tabindex="-1" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="RHCSA Community Study Guide" class="heading" id="RHCSA_Community_Study_Guide"><div class="heading-before"></div>RHCSA Community Study Guide<div class="heading-after">...</div></h1><div class="heading-children"><div><p>This repo serves as a community study guide for anyone that wants to study for the RHCSA exam. The idea is that anyone preparing for the exam can use the information here, as well as contribute (add, update, correct) to make it better. The aim is to have a free and Open Source study guide that is always up to date and with the best content.</p></div><div><p>Please adhere to the guidelines, and most importantly, Red Hat's NDA.</p></div><div><p><strong>Current Version:</strong> RHCSA v9 + v8 (<em>with container objectives</em>). Objectives which do not overlap are prefixed with RHCSA9 and RHCSA8 respectively.</p></div><div class="heading-wrapper"><h2 data-heading="How to use" class="heading" id="How_to_use"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>How to use<div class="heading-after">...</div></h2><div class="heading-children"><div><p>As a study guide it makes more sense to digest the content via your web browser. You can access it at the <a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a> page or via the official web site <a rel="noopener" class="external-link" href="https://rhcsa-study-guide.org" target="_blank">https://rhcsa-study-guide.org</a>.</p></div><div><p>If you want to edit the content, start by reviewing the <a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">rules</a>. After you can choose to edit the contents by following the proper procedure for contributing changes to a Git Hub repository (if you are not familiar with the Git Hub process you can find simple instructions <a data-tooltip-position="top" aria-label="https://kbroman.org/github_tutorial/pages/fork.html" rel="noopener" class="external-link" href="https://kbroman.org/github_tutorial/pages/fork.html" target="_blank">here</a>), or by creating a Git Hub <a data-tooltip-position="top" aria-label="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" target="_blank">issue</a>.</p></div><div class="heading-wrapper"><h3 data-heading="Rules and FAQ" class="heading" id="Rules_and_FAQ"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rules and FAQ<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Please review the rules before making any changes.</p></div><div><p><a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">Rules</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Study Content" class="heading" id="Study_Content"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Study Content<div class="heading-after">...</div></h2><div class="heading-children"><div><p>This is where you will be able to find various information about the exam, study guide, labs, study environments, etc.</p></div><div class="heading-wrapper"><h3 data-heading="Exam Format" class="heading" id="Exam_Format"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Exam Format<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The exam format for the current version of the exam.</p></div><div><p><a class="internal-link" data-href="markdown/Exam-Format.md" href="markdown/exam-format.html" target="_self" rel="noopener">Exam Format</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Objectives" class="heading" id="Objectives"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Objectives<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The current objectives for the exam (in enumerated list). This is where you can access the study guide's content.</p></div><div><p><a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Additional Resources" class="heading" id="Additional_Resources"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Additional Resources<div class="heading-after">...</div></h3><div class="heading-children"><div><p>This page will provide you additional resources that will greatly help with your study. Resources include instructional videos, environments, labs and much more.</p></div><div><p><a class="internal-link" data-href="markdown/Additional-Resources.md" href="markdown/additional-resources.html" target="_self" rel="noopener">Additional Resources</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Author" class="heading" id="Author"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Author<div class="heading-after">...</div></h2><div class="heading-children"><div><p><strong>Victor Mendonça</strong></p></div><div><ul>
+			</head><body class="mod-linux theme-light code-styler code-styler-style-inline code-styler-gutter-highlight sidebars-always-collapsible loading "><div class="webpage-container"><div class="sidebar-left sidebar"><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div><label class="theme-toggle-container" for="theme_toggle"><input class="theme-toggle-input" type="checkbox" id="theme_toggle"><div class="toggle-background"></div></label></div><div class="tree-container file-tree mod-nav-indicator" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">rhcsa-study-guide</span><button class="clickable-icon collapse-tree-button is-collapsed"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">markdown</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1-Understand-and-use-essential-tools</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1d-Access-remote-systems-using-SSH</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1d-access-remote-systems-using-ssh/1d-access-remote-systems-using-ssh-c3524.png"><span class="tree-item-title">1d-Access-remote-systems-using-SSH-c3524</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-folder mod-collapsible is-collapsed" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title">1f-archive-compress-unpack-and-uncompress-files-using-tar-star-gzip-and-bzip2</span></a></div><div class="tree-item-children" style="display: none;"><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a 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href="markdown/1-understand-and-use-essential-tools/1g-create-and-edit-text-files.html"><span class="tree-item-title">1g-Create-and-edit-text-files</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1h-create-delete-copy-and-move-files-and-directories.html"><span class="tree-item-title">1h-Create-delete-copy-and-move-files-and-directories</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/1-understand-and-use-essential-tools/1i-create-hard-and-soft-links.html"><span class="tree-item-title">1i-Create-hard-and-soft-links</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div 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data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-18965.png"><span class="tree-item-title">10b-inspect-container-images-18965</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-c29b2.png"><span class="tree-item-title">10b-inspect-container-images-c29b2</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="4"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10b-inspect-container-images/10b-inspect-container-images-ff33e.png"><span class="tree-item-title">10b-inspect-container-images-ff33e</span></a></div><div 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href="markdown/10-manage-containers/10d-perform-basic-container-management-such-as-running-starting-stopping-and-listing-running-containers.html"><span class="tree-item-title">10d-perform-basic-container-management-such-as-running-starting-stopping-and-listing-running-containers</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10e-run-a-service-inside-a-container.html"><span class="tree-item-title">10e-run-a-service-inside-a-container</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/10-manage-containers/10f-configure-a-container-to-start-automatically-as-a-systemd-service.html"><span 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class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/exam-format.html"><span class="tree-item-title">Exam-Format</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/objectives.html"><span class="tree-item-title">Objectives</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/rules.html"><span class="tree-item-title">Rules</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="readme.html"><span class="tree-item-title">README</span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="RHCSA Community Study Guide" class="heading" id="RHCSA_Community_Study_Guide"><div class="heading-before"></div>RHCSA Community Study Guide<div class="heading-after">...</div></h1><div class="heading-children"><div><p>This repo serves as a community study guide for anyone that wants to study for the RHCSA exam. The idea is that anyone preparing for the exam can use the information here, as well as contribute (add, update, correct) to make it better. The aim is to have a free and Open Source study guide that is always up to date and with the best content.</p></div><div><p><span alt="Pasted image 20231213192056.png" src="attachments/pasted-image-20231213192056.png" class="internal-embed media-embed image-embed is-loaded"><img alt="Pasted image 20231213192056.png" src="attachments/pasted-image-20231213192056.png"></span></p></div><div><p>Please adhere to the guidelines, and most importantly, <a data-tooltip-position="top" aria-label="https://www.redhat.com/en/about/red-hat-training-policies#terms" rel="noopener" class="external-link" href="https://www.redhat.com/en/about/red-hat-training-policies#terms" target="_blank">Red Hat's NDA</a>.</p></div><div><p><strong>Current Version:</strong> RHCSA v9 + v8 (<em>with container objectives</em>). Objectives which do not overlap are prefixed with RHCSA9 and RHCSA8 respectively.</p></div><div class="heading-wrapper"><h2 data-heading="How to use" class="heading" id="How_to_use"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>How to use<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The content is available in two places: the website (front end) <a rel="noopener" class="external-link" href="https://rhcsa-study-guide.org" target="_blank">https://rhcsa-study-guide.org</a>, and the repo (source files) <a rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide" target="_blank">https://github.com/victorbrca/rhcsa-study-guide</a> The website displays markdown files as html.</p></div><div><p>As a study guide it makes more sense to digest the content via your web browser. You can access it at the <a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a> page.</p></div><div><p>If you want to edit the content, start by reviewing the <a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">rules</a>. After you can choose to edit the contents by following the proper procedure for contributing changes to a Git Hub repository (if you are not familiar with the Git Hub process you can find simple instructions <a data-tooltip-position="top" aria-label="https://kbroman.org/github_tutorial/pages/fork.html" rel="noopener" class="external-link" href="https://kbroman.org/github_tutorial/pages/fork.html" target="_blank">here</a>), or by creating a Git Hub <a data-tooltip-position="top" aria-label="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" target="_blank">issue</a>.</p></div><div class="heading-wrapper"><h3 data-heading="Rules and FAQ" class="heading" id="Rules_and_FAQ"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rules and FAQ<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Please review the rules before making any changes.</p></div><div><p><a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">Rules</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Study Content" class="heading" id="Study_Content"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Study Content<div class="heading-after">...</div></h2><div class="heading-children"><div><p>This is where you will be able to find various information about the exam, study guide, labs, study environments, etc.</p></div><div class="heading-wrapper"><h3 data-heading="Exam Format" class="heading" id="Exam_Format"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Exam Format<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The exam format for the current version of the exam.</p></div><div><p><a class="internal-link" data-href="markdown/Exam-Format.md" href="markdown/exam-format.html" target="_self" rel="noopener">Exam Format</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Objectives" class="heading" id="Objectives"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Objectives<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The current objectives for the exam (in enumerated list). This is where you can access the study guide's content.</p></div><div><p><a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Additional Resources" class="heading" id="Additional_Resources"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Additional Resources<div class="heading-after">...</div></h3><div class="heading-children"><div><p>This page will provide you additional resources that will greatly help with your study. Resources include instructional videos, environments, labs and much more.</p></div><div><p><a class="internal-link" data-href="markdown/Additional-Resources.md" href="markdown/additional-resources.html" target="_self" rel="noopener">Additional Resources</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="About" class="heading" id="About"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>About<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Author" class="heading" id="Author"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Author<div class="heading-after">...</div></h3><div class="heading-children"><div><p><strong>Victor Mendonça</strong></p></div><div><ul>
 <li data-line="0">Site - <a data-tooltip-position="top" aria-label="https://victormendonca.com/" rel="noopener" class="external-link" href="https://victormendonca.com/" target="_blank">Victor Mendonça</a></li>
 <li data-line="1">GitHub - <a data-tooltip-position="top" aria-label="https://github.com/victorbrca" rel="noopener" class="external-link" href="https://github.com/victorbrca" target="_blank">victorbrca</a></li>
 <li data-line="2">Twitter - <a data-tooltip-position="top" aria-label="https://twitter.com/victorbrca" rel="noopener" class="external-link" href="https://twitter.com/victorbrca" target="_blank">@victorbrca</a></li>
-</ul></div><div class="mod-footer"></div></div></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#RHCSA_Community_Study_Guide"><span class="tree-item-title"><p>RHCSA Community Study Guide</p></span></a></div><div class="tree-item-children"><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#How_to_use"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>How to use</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Rules_and_FAQ"><span class="tree-item-title"><p>Rules and FAQ</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Study_Content"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>Study Content</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Exam_Format"><span class="tree-item-title"><p>Exam Format</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Objectives"><span class="tree-item-title"><p>Objectives</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Additional_Resources"><span class="tree-item-title"><p>Additional Resources</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Author"><span class="tree-item-title"><p>Author</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
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+</ul></div></div></div><div class="heading-wrapper"><h3 data-heading="Built With" class="heading" id="Built_With"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Built With<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
+<li data-line="0"><a data-tooltip-position="top" aria-label="https://obsidian.md/" rel="noopener" class="external-link" href="https://obsidian.md/" target="_blank">Obsidian - Sharpen your thinking</a></li>
+<li data-line="1"><a data-tooltip-position="top" aria-label="https://github.com/KosmosisDire/obsidian-webpage-export" rel="noopener" class="external-link" href="https://github.com/KosmosisDire/obsidian-webpage-export" target="_blank">GitHub - KosmosisDire/obsidian-webpage-export: Webpage HTML Export lets you export single files or whole vaults as HTML websites or documents. It is similar to publish, but you get direct access to the exported HTML.</a></li>
+</ul></div><div class="mod-footer"></div></div></div></div></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#RHCSA_Community_Study_Guide"><span class="tree-item-title"><p>RHCSA Community Study Guide</p></span></a></div><div class="tree-item-children"><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#How_to_use"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>How to use</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Rules_and_FAQ"><span class="tree-item-title"><p>Rules and FAQ</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Study_Content"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>Study Content</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Exam_Format"><span class="tree-item-title"><p>Exam Format</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Objectives"><span class="tree-item-title"><p>Objectives</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Additional_Resources"><span class="tree-item-title"><p>Additional Resources</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#About"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>About</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Author"><span class="tree-item-title"><p>Author</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Built_With"><span class="tree-item-title"><p>Built With</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
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+		<title>README</title>
+		<base href="./">
+		<meta id="root-path" root-path="./">
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+			<link rel="stylesheet" href="lib/styles/theme.css">
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+			<style>  </style>
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+<script src="lib/scripts/generated.js"></script>
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class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/exam-format.html"><span class="tree-item-title">Exam-Format</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/objectives.html"><span class="tree-item-title">Objectives</span></a></div><div class="tree-item-children"></div></div><div class="tree-item mod-tree-file" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="markdown/rules.html"><span class="tree-item-title">Rules</span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-tree-file" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="readme.html"><span class="tree-item-title">README</span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div></div><div class="document-container show"><div class="markdown-preview-view markdown-rendered node-insert-event show-indentation-guide allow-fold-headings" style="tab-size: 2;"><style id="MJX-CHTML-styles"></style><div class="markdown-preview-sizer markdown-preview-section" style="min-height: 418px;"><div class="markdown-preview-pusher" style="width: 1px; height: 0.1px; margin-bottom: 0px;"></div><div class="mod-header"></div><div class="heading-wrapper"><h1 data-heading="RHCSA Community Study Guide" class="heading" id="RHCSA_Community_Study_Guide"><div class="heading-before"></div>RHCSA Community Study Guide<div class="heading-after">...</div></h1><div class="heading-children"><div><p>This repo serves as a community study guide for anyone that wants to study for the RHCSA exam. The idea is that anyone preparing for the exam can use the information here, as well as contribute (add, update, correct) to make it better. The aim is to have a free and Open Source study guide that is always up to date and with the best content.</p></div><div><p><span alt="Pasted image 20231213192056.png" src="attachments/pasted-image-20231213192056.png" class="internal-embed media-embed image-embed is-loaded"><img alt="Pasted image 20231213192056.png" src="attachments/pasted-image-20231213192056.png"></span></p></div><div><p>Please adhere to the guidelines, and most importantly, <a data-tooltip-position="top" aria-label="https://www.redhat.com/en/about/red-hat-training-policies#terms" rel="noopener" class="external-link" href="https://www.redhat.com/en/about/red-hat-training-policies#terms" target="_blank">Red Hat's NDA</a>.</p></div><div><p><strong>Current Version:</strong> RHCSA v9 + v8 (<em>with container objectives</em>). Objectives which do not overlap are prefixed with RHCSA9 and RHCSA8 respectively.</p></div><div class="heading-wrapper"><h2 data-heading="How to use" class="heading" id="How_to_use"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>How to use<div class="heading-after">...</div></h2><div class="heading-children"><div><p>The content is available in two places: the website (front end) <a rel="noopener" class="external-link" href="https://rhcsa-study-guide.org" target="_blank">https://rhcsa-study-guide.org</a>, and the repo (source files) <a rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide" target="_blank">https://github.com/victorbrca/rhcsa-study-guide</a> The website displays markdown files as html.</p></div><div><p>As a study guide it makes more sense to digest the content via your web browser. You can access it at the <a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a> page.</p></div><div><p>If you want to edit the content, start by reviewing the <a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">rules</a>. After you can choose to edit the contents by following the proper procedure for contributing changes to a Git Hub repository (if you are not familiar with the Git Hub process you can find simple instructions <a data-tooltip-position="top" aria-label="https://kbroman.org/github_tutorial/pages/fork.html" rel="noopener" class="external-link" href="https://kbroman.org/github_tutorial/pages/fork.html" target="_blank">here</a>), or by creating a Git Hub <a data-tooltip-position="top" aria-label="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" rel="noopener" class="external-link" href="https://github.com/victorbrca/rhcsa-study-guide/issues/new/choose" target="_blank">issue</a>.</p></div><div class="heading-wrapper"><h3 data-heading="Rules and FAQ" class="heading" id="Rules_and_FAQ"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Rules and FAQ<div class="heading-after">...</div></h3><div class="heading-children"><div><p>Please review the rules before making any changes.</p></div><div><p><a class="internal-link" data-href="markdown/Rules.md" href="markdown/rules.html" target="_self" rel="noopener">Rules</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="Study Content" class="heading" id="Study_Content"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Study Content<div class="heading-after">...</div></h2><div class="heading-children"><div><p>This is where you will be able to find various information about the exam, study guide, labs, study environments, etc.</p></div><div class="heading-wrapper"><h3 data-heading="Exam Format" class="heading" id="Exam_Format"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Exam Format<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The exam format for the current version of the exam.</p></div><div><p><a class="internal-link" data-href="markdown/Exam-Format.md" href="markdown/exam-format.html" target="_self" rel="noopener">Exam Format</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Objectives" class="heading" id="Objectives"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Objectives<div class="heading-after">...</div></h3><div class="heading-children"><div><p>The current objectives for the exam (in enumerated list). This is where you can access the study guide's content.</p></div><div><p><a class="internal-link" data-href="markdown/Objectives.md" href="markdown/objectives.html" target="_self" rel="noopener">Objectives</a></p></div></div></div><div class="heading-wrapper"><h3 data-heading="Additional Resources" class="heading" id="Additional_Resources"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Additional Resources<div class="heading-after">...</div></h3><div class="heading-children"><div><p>This page will provide you additional resources that will greatly help with your study. Resources include instructional videos, environments, labs and much more.</p></div><div><p><a class="internal-link" data-href="markdown/Additional-Resources.md" href="markdown/additional-resources.html" target="_self" rel="noopener">Additional Resources</a></p></div></div></div></div></div><div class="heading-wrapper"><h2 data-heading="About" class="heading" id="About"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>About<div class="heading-after">...</div></h2><div class="heading-children"><div class="heading-wrapper"><h3 data-heading="Author" class="heading" id="Author"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Author<div class="heading-after">...</div></h3><div class="heading-children"><div><p><strong>Victor Mendonça</strong></p></div><div><ul>
+<li data-line="0">Site - <a data-tooltip-position="top" aria-label="https://victormendonca.com/" rel="noopener" class="external-link" href="https://victormendonca.com/" target="_blank">Victor Mendonça</a></li>
+<li data-line="1">GitHub - <a data-tooltip-position="top" aria-label="https://github.com/victorbrca" rel="noopener" class="external-link" href="https://github.com/victorbrca" target="_blank">victorbrca</a></li>
+<li data-line="2">Twitter - <a data-tooltip-position="top" aria-label="https://twitter.com/victorbrca" rel="noopener" class="external-link" href="https://twitter.com/victorbrca" target="_blank">@victorbrca</a></li>
+</ul></div></div></div><div class="heading-wrapper"><h3 data-heading="Built With" class="heading" id="Built_With"><div class="heading-before"></div><div class="heading-collapse-indicator collapse-indicator collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle" style="width: 24px; max-width: 100%;"><path d="M3 8L12 17L21 8"></path></svg></div>Built With<div class="heading-after">...</div></h3><div class="heading-children"><div><ul>
+<li data-line="0"><a data-tooltip-position="top" aria-label="https://obsidian.md/" rel="noopener" class="external-link" href="https://obsidian.md/" target="_blank">Obsidian - Sharpen your thinking</a></li>
+<li data-line="1"><a data-tooltip-position="top" aria-label="https://github.com/KosmosisDire/obsidian-webpage-export" rel="noopener" class="external-link" href="https://github.com/KosmosisDire/obsidian-webpage-export" target="_blank">GitHub - KosmosisDire/obsidian-webpage-export: Webpage HTML Export lets you export single files or whole vaults as HTML websites or documents. It is similar to publish, but you get direct access to the exported HTML.</a></li>
+</ul></div><div class="mod-footer"></div></div></div></div></div></div></div></div></div></div><div class="sidebar-right sidebar"><div class="sidebar-gutter"><div class="clickable-icon sidebar-collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="svg-icon"><path d="M21 3H3C1.89543 3 1 3.89543 1 5V19C1 20.1046 1.89543 21 3 21H21C22.1046 21 23 20.1046 23 19V5C23 3.89543 22.1046 3 21 3Z"></path><path d="M10 4V20"></path><path d="M4 7H7"></path><path d="M4 10H7"></path><path d="M4 13H7"></path></svg></div></div><div class="sidebar-container"><div class="sidebar-sizer"><div class="sidebar-content-positioner"><div class="sidebar-content"><div class="tree-container outline-tree" data-depth="0"><div class="tree-header"><span class="sidebar-section-header">Table Of Contents</span><button class="clickable-icon collapse-tree-button"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></svg></button></div><div class="tree-scroll-area"><div class="tree-item" data-depth="1"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#RHCSA_Community_Study_Guide"><span class="tree-item-title"><p>RHCSA Community Study Guide</p></span></a></div><div class="tree-item-children"><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#How_to_use"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>How to use</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Rules_and_FAQ"><span class="tree-item-title"><p>Rules and FAQ</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Study_Content"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>Study Content</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Exam_Format"><span class="tree-item-title"><p>Exam Format</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Objectives"><span class="tree-item-title"><p>Objectives</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Additional_Resources"><span class="tree-item-title"><p>Additional Resources</p></span></a></div><div class="tree-item-children"></div></div></div></div><div class="tree-item mod-collapsible" data-depth="2"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#About"><div class="tree-item-icon collapse-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="svg-icon right-triangle"><path d="M3 8L12 17L21 8"></path></svg></div><span class="tree-item-title"><p>About</p></span></a></div><div class="tree-item-children"><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Author"><span class="tree-item-title"><p>Author</p></span></a></div><div class="tree-item-children"></div></div><div class="tree-item" data-depth="3"><div class="tree-item-contents"><a class="internal-link tree-item-link" href="#Built_With"><span class="tree-item-title"><p>Built With</p></span></a></div><div class="tree-item-children"></div></div></div></div></div></div></div></div></div></div></div></div></div></div></body></html>
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