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DAY 1.md

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DAY1

  • initiated with a video over ways of communication , ways to easily communicate and develop a network
  • Application/Software -> Interpreter -> Kernel -> RAM,CPU,HardDisk (Kernel interacts with the hardware and checks for space availability. ##operating systems @Student's point of view~:
    1. Windows(Closed Source)
    2. Linux (Open Source)--> its a kernel and not an OS
    3. Mac(Costly)

To change backend code of Firefox~:

$ gedit /usr/bin/Firefox -> Change the Code

Kernal(3 types)~:

  1. NT(Windows) ~: .exe(extension) && Examples ~ (Windows 7,8,10)
  2. LINUX -> RPM(.rpm) { used for bigdata in redhat } Debian(.deb) {used for ML in Ubuntu/mint}
  3. DARWIN ~ :.dmg && Examples ~ (OSX , SNOWL)

Few useful Linux Commands~:

  • $ mkdir folder-name{1..50} # {} encloses a range and creates 50 folder in linux
  • $ useradd user-name # Creates a new user
  • $ pinky # shows information of all available users
  • $ rm -f # Forcefully remove files
  • $ rm -fv # forcefully remove file with an action responding work done
  • press F2 # used to rename a file
  • $ cal September 1752 # shows september calendar with dates missing from 3 to 13
  • $ date +%Y # Current year
  • $ date +%A # Current Weekday
  • $ date +%T # Current Time
  • $ date --help # all options available with date command
  • $ cal -j # Shows Julean Calendar
  • $ bc # opens a calculator
  • $ ls -F # check which is folder and which is file in a directory
  • $ mkdir -p folder1/folder2 # both folders will be created together
  • $ rm -rf pi* # deletes all folders starting with 'pi' , use anything instead of 'pi'
  • $ su # switch users through command line

Default Architecture of Windows~:

  • Main Account ~ : Admin
  • Text Editor ~ : Notepad
  • CMD
  • Internet Explorer
  • .exe based OS
  • OS Storage ~ : C Drive
  • C:\user\user-name # Stores info about environment of seperate users(Desktop,Downloads,Videos etc..)

Default Architecture of Linux(Red Hat)~:

  • Main Account ~: root
  • Text editor ~: Gedit
  • Terminal
  • Firefox
  • .rpm based
  • OS Storage ~: /(backslash)
  • /home # Stores folders of different users each with seperate data
  • /root ~> Admin

Python Integration in Various Technologies~:

  1. Pi (meu)python ~> Raspberyy pi
  2. Web-App ~> Django,FLask
  3. All Databases
  4. OS ~> Linux,Windows,Mac
  5. Network --> Devices (Router,Switch,etc)
  6. Bigdata
  7. Cloud Computing
  8. .NET ~> ironpython
  9. JAVA ~> Jython

To install Python 3.6 in rhel 7.5 server~ :

  1. move to etc directory (using cd command)
  2. move to yum.repos.d/ directory
  3. create a new repo ~ > gedit adhoc.repo
  4. write~ : [ad] # []these brackets can enclose anything, you can write Pykid instead as well. baseurl=http://13.234.66.67/summer19/python3 # online repository created by adhoc networks gpgcheck=0 # not to ask for certification
  5. save it and run command yum install python3* -y
  6. Python installed successully.

Notes:

  1. Calendar used by linux is called Georgian andd other available is Julean
  2. CNCF ~ : A great open source Community
  3. Python is an interpreted language.
  4. Python provides reusability of memory ~ > (Stores the value and not the variable)
  5. Each website we run on browser, temporarily stores all its information on local pc RAM
  6. (75~80) % of the data in the world is stored in string format.
  7. ML and AI both uses int/float values

Data-Types~ :

  1. Immutable
    • Python is strictly binded
    • examples ( int,float,str,byte,tuple)
  2. Mutable examples (list,set,dictionary)

TASK OF THE DAY~ :

  1. show files and folders of different folders other then desktop as default on monitor {open \home\adhoc.config ~ > gedit user-dirs.dirs ~ > swap Desktop with Downloads ~ > Restart}
  2. First time run Command should always give some error
  3. Study Concept of Recycle Bin -- how it works {done, recycle bin keeps the metadata of files,and flags it to be deleted until user permanently deletes the file from recycle bin}
  4. Make different copies of a >5MB file in a directory using only 5MB storage.
  5. why 3 to 13 dates are missing from september 1752 calendar? {To get the calendar back in sync with astronomical events like the vernal equinox or the winter solstice, a number of days were dropped}
  6. Create 100 folders and delete them in Windows { use os module and make python code }
  7. Find the part of RAM where how much byte of data is actually stored or provided to a variable can be checked { it can be checked through system monitor in linux and task manager in windows }
  8. Make 500 variables and check change in size of RAM then replace variable's value with 'None' and re-check the RAM.