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CS 136 Lab 1
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Last login: Thu Oct 13 12:31:08 on ttys000
Jon-2:~ jonnguy$ man adduser
No manual entry for adduser
Jon-2:~ jonnguy$ less etc/group
etc/group: No such file or directory
Jon-2:~ jonnguy$ sudo addgroup temp
sudo: addgroup: command not found
Jon-2:~ jonnguy$ ls
Applications Documents Dropbox Movies Pictures blank
Desktop Downloads Library Music Public test
Jon-2:~ jonnguy$ ls
Applications Documents Dropbox Movies Pictures blank
Desktop Downloads Library Music Public test
Jon-2:~ jonnguy$ ssh [email protected]
Password:
Last login: Thu Oct 13 15:53:18 2011 from cpe-76-167-224-
Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 8.2-RELEASE-p3 (USERS8) #2: Wed Sep 28 12:01:21 PDT 2011
[la236ay@users ~]$ ssh pc180
Linux server.permandfwalls.uclaclass.isi.deterlab.net 2.6.32-31-generic-pae #60 SMP Thu Apr 7 17:02:54 PDT 2011 i686 GNU/Linux
Ubuntu 10.04.2 LTS
Welcome to Ubuntu!
* Documentation: https://help.ubuntu.com/
System information as of Thu Oct 13 16:06:24 PDT 2011
System load: 0.77 Processes: 146
Usage of /: 15.8% of 14.67GB Users logged in: 0
Memory usage: 7% IP address for eth6: 10.1.1.3
Swap usage: 0% IP address for eth8: 192.168.1.180
Graph this data and manage this system at https://landscape.canonical.com/
Last login: Thu Oct 13 16:05:52 2011 from users.isi.deterlab.net
la236ay@server:~$ ls
top_secret
la236ay@server:~$ sudo mkdir admins
la236ay@server:~$ ls
admins top_secret
la236ay@server:~$ addgroup emp
addgroup: Only root may add a user or group to the system.
la236ay@server:~$ sudo addgroup emp
Adding group `emp' (GID 1001) ...
Done.
la236ay@server:~$ man adduser
la236ay@server:~$ ls
admins top_secret
la236ay@server:~$ sudo adduser larry
Adding user `larry' ...
Adding new group `larry' (1002) ...
Adding new user `larry' (1001) with group `larry' ...
Creating home directory `/home/larry' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for larry
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n] y
la236ay@server:~$
la236ay@server:~$ sudo adduser moe
Adding user `moe' ...
Adding new group `moe' (1003) ...
Adding new user `moe' (1002) with group `moe' ...
Creating home directory `/home/moe' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for moe
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
la236ay@server:~$
la236ay@server:~$ sudo adduser curly
Adding user `curly' ...
Adding new group `curly' (1004) ...
Adding new user `curly' (1003) with group `curly' ...
Creating home directory `/home/curly' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for curly
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
la236ay@server:~$
la236ay@server:~$ sudo adduser --home ~/admins/ken ken
Adding user `ken' ...
Adding new group `ken' (1005) ...
Adding new user `ken' (1004) with group `ken' ...
Creating home directory `/users/la236ay/admins/ken' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for ken
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
la236ay@server:~$ ls
admins top_secret
la236ay@server:~$ cd admins
la236ay@server:~/admins$ ls
ken
la236ay@server:~/admins$ sudo adduser --home ~/admins/dmr dmr
Adding user `dmr' ...
Adding new group `dmr' (1006) ...
Adding new user `dmr' (1005) with group `dmr' ...
Creating home directory `/users/la236ay/admins/dmr' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for dmr
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
la236ay@server:~/admins$ sudo adduser --home ~/admins/bwk bwk
Adding user `bwk' ...
Adding new group `bwk' (1007) ...
Adding new user `bwk' (1006) with group `bwk' ...
Creating home directory `/users/la236ay/admins/bwk' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for bwk
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
la236ay@server:~/admins$ sudo addgroup wheel
Adding group `wheel' (GID 1008) ...
Done.
la236ay@server:~/admins$ ls
bwk dmr ken
la236ay@server:~/admins$ cd ..
la236ay@server:~$ ls
admins top_secret
la236ay@server:~$ usermod -a -G emp larry
usermod: cannot lock /etc/passwd; try again later.
la236ay@server:~$ sudo usermod -a -G emp larry
la236ay@server:~$ sudo usermod -a -G emp moe
la236ay@server:~$ sudo usermod -a -G emp curly
la236ay@server:~$ sudo usermod -a -G wheel ken
la236ay@server:~$ sudo usermod -a -G wheel dmr
la236ay@server:~$ sudo usermod -a -G wheel bwk
la236ay@server:~$ sudo usermod -a -G ken larry
la236ay@server:~$ sudo usermod -a -G ken bwk
la236ay@server:~$ sudo usermod -a -G ken dmr
la236ay@server:~$ sudo usermod -a -G bwk moe
la236ay@server:~$ sudo usermod -a -G bwk dmr
la236ay@server:~$ sudo usermod -a -G bwk ken
la236ay@server:~$ sudo usermod -a -G dmr curly
la236ay@server:~$ sudo usermod -a -G dmr ken
la236ay@server:~$ sudo usermod -a -G dmr bwk
la236ay@server:~$ ls
admins top_secret
la236ay@server:~$ cd /home
la236ay@server:/home$ cd .
la236ay@server:/home$ cd ..
la236ay@server:/$ ls
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
la236ay@server:/$ ls -al
total 120
drwxr-xr-x 28 root root 4096 2011-10-13 16:05 .
drwxr-xr-x 28 root root 4096 2011-10-13 16:05 ..
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:10 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxr-xr-x 6 root root 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 140 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:04 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:09 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ sudo chgrp wheel home
la236ay@server:/$ ls
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
la236ay@server:/$ ls -l
total 112
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:10 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxr-xr-x 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 140 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:04 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:09 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ ls
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
la236ay@server:/$ ls -l
total 112
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:10 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxr-xr-x 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 140 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:04 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:14 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ sudo chmod 770 home
la236ay@server:/$ ls
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
la236ay@server:/$ ls
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
la236ay@server:/$ cd ~/admins
la236ay@server:~/admins$ ls
bwk dmr ken
la236ay@server:~/admins$ ls
bwk dmr ken
la236ay@server:~/admins$ ls -l
total 6
drwxr-xr-x 2 bwk bwk 512 2011-10-13 16:08 bwk
drwxr-xr-x 2 dmr dmr 512 2011-10-13 16:08 dmr
drwxr-xr-x 2 ken ken 512 2011-10-13 16:08 ken
la236ay@server:~/admins$ cd bwk
la236ay@server:~/admins/bwk$ ls -l
total 0
la236ay@server:~/admins/bwk$ cd ..
la236ay@server:~/admins$ ls
bwk dmr ken
la236ay@server:~/admins$ chmod 775 bwk
chmod: changing permissions of `bwk': Operation not permitted
la236ay@server:~/admins$ sudo chmod -R 775 bwk
la236ay@server:~/admins$ ls -l
total 6
drwxrwxr-x 2 bwk bwk 512 2011-10-13 16:08 bwk
drwxr-xr-x 2 dmr dmr 512 2011-10-13 16:08 dmr
drwxr-xr-x 2 ken ken 512 2011-10-13 16:08 ken
la236ay@server:~/admins$ sudo chmod -R 775 ken
la236ay@server:~/admins$ sudo chmod -R 775 dmr
la236ay@server:~/admins$ sudo chmod 765 ken
la236ay@server:~/admins$ sudo chmod 765 dmr
la236ay@server:~/admins$ sudo chmod 765 bwk
la236ay@server:~/admins$ ls
bwk dmr ken
la236ay@server:~/admins$ ls -l
total 6
drwxrw-r-x 2 bwk bwk 512 2011-10-13 16:08 bwk
drwxrw-r-x 2 dmr dmr 512 2011-10-13 16:08 dmr
drwxrw-r-x 2 ken ken 512 2011-10-13 16:08 ken
la236ay@server:~/admins$ chmod g+s bwk
chmod: changing permissions of `bwk': Operation not permitted
la236ay@server:~/admins$ sudo chmod g+s bwk
la236ay@server:~/admins$ sudo chmod g+s ken
la236ay@server:~/admins$ sudo chmod g+s dmr
la236ay@server:~/admins$ cd /root
la236ay@server:/root$ ./submit.sh
Creating submission file: '/root/la236ay-permissions'
cp: cannot stat `/admins': No such file or directory
cp: cannot stat `/tpsreports': No such file or directory
cp: cannot stat `/ballots': No such file or directory
tar: Removing leading `/' from member names
Done.
la236ay@server:/root$ ls
firewall la236ay-permissions-1318548654.tar.gz permissions-answers.txt restore.sh restore.sh~ submit.sh
la236ay@server:/root$ ./submit.sh
Creating submission file: '/root/la236ay-permissions'
cp: cannot stat `/admins': No such file or directory
cp: cannot stat `/tpsreports': No such file or directory
cp: cannot stat `/ballots': No such file or directory
tar: Removing leading `/' from member names
Done.
la236ay@server:/root$ ls
firewall la236ay-permissions-1318548666.tar.gz restore.sh submit.sh
la236ay-permissions-1318548654.tar.gz permissions-answers.txt restore.sh~
la236ay@server:/root$ cd ..
la236ay@server:/$ ls
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
la236ay@server:/$ cd ..
la236ay@server:/$ ls
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
la236ay@server:/$ cd
la236ay@server:~$ ls
admins top_secret
la236ay@server:~$ mv admins /admins
mv: cannot create directory `/admins': Permission denied
la236ay@server:~$ sudo mv admins /admins
la236ay@server:~$ ls
top_secret
la236ay@server:~$ cd
la236ay@server:~$ ls
top_secret
la236ay@server:~$ cd /home
-bash: cd: /home: Permission denied
la236ay@server:~$ sudo cd /home
sudo: cd: command not found
la236ay@server:~$ sudo /admins
sudo: /admins: command not found
la236ay@server:~$ ls
top_secret
la236ay@server:~$ cd /admins
la236ay@server:/admins$ cd ..
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ ls -l
total 116
drwxr-xr-x 5 root UCLAClass 4096 2011-10-13 16:08 admins
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:10 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxrwx--- 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 139 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:31 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:19 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ whoami
la236ay
la236ay@server:/$ usermod -G wheel la236ay
usermod: cannot lock /etc/passwd; try again later.
la236ay@server:/$ sudo usermod -G wheel la236ay
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ cd /home
-bash: cd: /home: Permission denied
la236ay@server:/$ cd home
-bash: cd: home: Permission denied
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ ls -l
total 116
drwxr-xr-x 5 root UCLAClass 4096 2011-10-13 16:08 admins
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:32 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxrwx--- 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 139 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:31 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:19 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ less /etc/group
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ cd
la236ay@server:~$ ls
top_secret
la236ay@server:~$ touch a
la236ay@server:~$ ls
a top_secret
la236ay@server:~$ ls -l
total 2
-rw-r--r-- 1 la236ay UCLAClass 0 2011-10-13 16:33 a
drwxr-xr-x 2 la236ay UCLAClass 512 2011-10-03 17:37 top_secret
la236ay@server:~$ ls /home
ls: cannot open directory /home: Permission denied
la236ay@server:~$ cd /root
la236ay@server:/root$ ls
firewall la236ay-permissions-1318548666.tar.gz restore.sh submit.sh
la236ay-permissions-1318548654.tar.gz permissions-answers.txt restore.sh~
la236ay@server:/root$ ./submit.sh
Creating submission file: '/root/la236ay-permissions'
cp: cannot stat `/tpsreports': No such file or directory
cp: cannot stat `/ballots': No such file or directory
tar: Removing leading `/' from member names
Done.
la236ay@server:/root$ cd
la236ay@server:~$ cd /admins
la236ay@server:/admins$ ls
bwk dmr ken
la236ay@server:/admins$ cd ..
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ ls -l
total 116
drwxr-xr-x 5 root UCLAClass 4096 2011-10-13 16:08 admins
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:32 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxrwx--- 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 139 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:33 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:19 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ chmod g-r home
chmod: changing permissions of `home': Operation not permitted
la236ay@server:/$ sudo chmod g-r home
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ ls -l
total 116
drwxr-xr-x 5 root UCLAClass 4096 2011-10-13 16:08 admins
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:32 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwx-wx--- 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 139 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:33 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:19 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ sudo chmod g+r home
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ mkdir /ballots
mkdir: cannot create directory `/ballots': Permission denied
la236ay@server:/$ ls
admins boot dev groups initrd.img lib lost+found mnt proc root scratch share sys users var vmlinuz.old
bin cdrom etc home initrd.img.old local media opt proj sbin selinux srv tmp usr vmlinuz
la236ay@server:/$ sudo mkdir /ballot
la236ay@server:/$ sudo mkdir /ballots
la236ay@server:/$ cd /ballots
la236ay@server:/ballots$ cd ..
la236ay@server:/$ ls
admins bin dev home lib media proc sbin share tmp var
ballot boot etc initrd.img local mnt proj scratch srv users vmlinuz
ballots cdrom groups initrd.img.old lost+found opt root selinux sys usr vmlinuz.old
la236ay@server:/$ cd /
la236ay@server:/$ ls
admins bin dev home lib media proc sbin share tmp var
ballot boot etc initrd.img local mnt proj scratch srv users vmlinuz
ballots cdrom groups initrd.img.old lost+found opt root selinux sys usr vmlinuz.old
la236ay@server:/$ rmdir ballot
rmdir: failed to remove `ballot': Permission denied
la236ay@server:/$ sudo rmdir ballot
la236ay@server:/$ ls -l
total 120
drwxr-xr-x 5 root UCLAClass 4096 2011-10-13 16:08 admins
drwxr-xr-x 2 root root 4096 2011-10-13 16:35 ballots
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:32 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxrwx--- 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 139 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:33 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:19 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ sudo chmod 333 ballots
la236ay@server:/$ ls
admins boot etc initrd.img local mnt proj scratch srv users vmlinuz
ballots cdrom groups initrd.img.old lost+found opt root selinux sys usr vmlinuz.old
bin dev home lib media proc sbin share tmp var
la236ay@server:/$ ls -l
total 120
drwxr-xr-x 5 root UCLAClass 4096 2011-10-13 16:08 admins
d-wx-wx-wx 2 root root 4096 2011-10-13 16:35 ballots
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:32 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxrwx--- 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 139 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:33 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:19 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ ls
admins boot etc initrd.img local mnt proj scratch srv users vmlinuz
ballots cdrom groups initrd.img.old lost+found opt root selinux sys usr vmlinuz.old
bin dev home lib media proc sbin share tmp var
la236ay@server:/$ ls -l
total 120
drwxr-xr-x 5 root UCLAClass 4096 2011-10-13 16:08 admins
d-wx-wx-wx 2 root root 4096 2011-10-13 16:35 ballots
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 bin
drwxr-xr-x 3 root root 4096 2011-04-08 18:44 boot
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 cdrom
drwxr-xr-x 16 root root 3780 2011-10-13 16:04 dev
drwxr-xr-x 91 root root 4096 2011-10-13 16:32 etc
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 groups
drwxrwx--- 6 root wheel 4096 2011-10-13 16:07 home
lrwxrwxrwx 1 root root 37 2011-04-08 18:43 initrd.img -> boot/initrd.img-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 37 2011-02-15 23:41 initrd.img.old -> boot/initrd.img-2.6.32-28-generic-pae
drwxr-xr-x 17 root root 12288 2011-02-15 23:41 lib
drwxr-xr-x 3 root root 4096 2010-06-02 19:54 local
drwx------ 2 root root 16384 2010-06-01 18:15 lost+found
drwxr-xr-x 2 root root 4096 2010-06-01 18:15 media
drwxr-xr-x 2 root root 4096 2010-04-23 03:11 mnt
drwxr-xr-x 2 root root 4096 2010-06-01 18:16 opt
dr-xr-xr-x 139 root root 0 2011-10-13 16:04 proc
drwxr-xr-x 3 root root 4096 2011-10-13 16:04 proj
drwxr-xr-x 7 root root 4096 2011-10-13 16:33 root
drwxr-xr-x 2 root root 4096 2011-02-15 23:41 sbin
drwxr-xr-x 2 root root 4096 2010-06-28 20:32 scratch
drwxr-xr-x 2 root root 4096 2009-12-05 13:55 selinux
drwxrwx--- 2 root root 4096 2010-06-02 19:54 share
drwxr-xr-x 3 root root 4096 2010-06-02 17:55 srv
drwxr-xr-x 13 root root 0 2011-10-13 16:04 sys
drwxrwxrwt 4 root root 4096 2011-10-13 16:19 tmp
drwxr-xr-x 81 root root 4096 2011-10-13 16:04 users
drwxr-xr-x 12 root root 4096 2010-06-02 17:55 usr
drwxr-xr-x 17 root root 4096 2011-10-13 16:05 var
lrwxrwxrwx 1 root root 34 2011-04-08 18:43 vmlinuz -> boot/vmlinuz-2.6.32-31-generic-pae
lrwxrwxrwx 1 root root 34 2011-02-15 23:41 vmlinuz.old -> boot/vmlinuz-2.6.32-28-generic-pae
la236ay@server:/$ sudo chmod 771 home
la236ay@server:/$ ls
admins boot etc initrd.img local mnt proj scratch srv users vmlinuz
ballots cdrom groups initrd.img.old lost+found opt root selinux sys usr vmlinuz.old
bin dev home lib media proc sbin share tmp var
la236ay@server:/$ cd home
la236ay@server:/home$ ls
ls: cannot open directory .: Permission denied
la236ay@server:/home$ cd larry
la236ay@server:/home/larry$