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Introduction to Linux

Linux is an operation system.Operating system means it is a system software which manages computer hardware and software.

Example for the operation system are,

mac OS
UNIX
Linux - Ubuntu
Microsoft windows

Linux-Ubuntu

It is a type of operating system.

Terminal

It is a command line-interface where we can type and execute text based commands.

Basic Linux commands

01.ls - List command

It used to list down the files on the current directory.

02.cd - Change Directory

It proceed the user to change between two directories.

03.mv - Move

It allow the user to move the file or directory.

04.man - manual command

05.mkdir - make directory

It used to create a new document.

06.rmdir - remove directory

It used to remove a document.

07.clear - Clear a terminal for afresh start.

08.cd - Back

It back to the initial position.

09. cd .. - one step back

It back to one step back.

10.rm - delete

It delete the file.

11.tree - Display files and folders in an order.

12.touch - create a file like .html .txt

13.du - show how much space each file take.

13.cp - copy source file to target file.

14.exit - exit from the terminal.

15.if - execute a command conditionally.

16.look - shows any line in a file containing given string in the begining.

17.source - Run commands from a specified file.

18.lsof - list open files.

19.su - Changer user id

20.ul - underline text

21.password - user may change their own password at any time using terminal.

22.history - Show the command history

23.dd - convert and copy files.

24.du - Show how much space each file takes up

25.ln - creates an internal link.

26.find - search for a file in a given directory.

27.less - used to browse the content of the specified file.

28.diff - compares the contents of any two file.

29.date - displays the current system time.

30.pwd - Display the pathname of the current director.

The following picture description will execute the above cammans: