Basic commands for Linux

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1. ls: 

This command is used to list the contents of a directory. By default, it displays the contents of the current directory, but you can specify a different directory as an argument.

2. cd: 

This command is used to change the current working directory. You can specify the directory you want to change to as an argument.

3. pwd:

 This command prints the current working directory.

4. mkdir:

This command creates a new directory. You specify the name of the new directory as an argument.

5. rmdir:

 This command removes an empty directory. If the directory contains files or other directories, you will need to use the rm command instead.

6. cp:

 This command is used to copy files or directories. You specify the source file or directory and the destination as arguments.

7. rm:

 This command is used to remove files or directories. Be careful when using this command, as it permanently deletes files and directories.

8. mv:

 This command is used to move or rename files or directories. You specify the source file or directory and the destination as arguments.

9. cat:

 This command displays the contents of one or more files. You can specify multiple files as arguments.

10. echo:

 This command displays a line of text. You can specify the text you want to display as an argument.

11. grep:

 This command searches for a pattern in a file or output. You specify the pattern and the file or output to search as arguments.

12. chmod:

 This command is used to change the permissions on a file or directory. You specify the permissions you want to set and the file or directory as arguments.

13. chown:

 This command is used to change the owner or group of a file or directory. You specify the new owner or group and the file or directory as arguments.

14. sudo:

 This command is used to execute a command with superuser (root) privileges. This is necessary for certain operations that require elevated privileges.

15. tar:

 This command is used to create or extract archive files. Archive files are used to bundle multiple files into a single file for easier distribution or backup.

 16.clear:

 Clear the terminal

17.reboot :

Reboots the system

18.shutdown:

Showdown the system for specified minutes

19.shutdown now:

Showdown the system immediately

20.tree:

Show directory in tree structure

21.alias:

Instruct the shell to replace one string with another string while executing the commands

22.ln:

Create a hard link or symlink to an existing file or directory.

23.touch:

Create file in the system

24.nano:

Open command line text editor

25.bc:

Using arithmetic operation in terminal


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