This article lists common Linux commands along with a brief description of their functionality

1. `ls`: Lists files and directories in the current directory.
2. `cd`: Changes the current directory.
3. `pwd`: Prints the current working directory.
4. `mkdir`: Creates a new directory.
5. `rm`: Removes files and directories.
6. `cp`: Copies files and directories.
7. `mv`: Moves or renames files and directories.
8. `cat`: Concatenates and displays file content.
9. `head`: Displays the beginning of a file.
10. `tail`: Displays the end of a file.
11. `grep`: Searches for a pattern in files.
12. `find`: Searches for files and directories.
13. `chmod`: Changes permissions of files and directories.
14. `chown`: Changes ownership of files and directories.
15. `ssh`: Connects to a remote server using SSH.
16. `ping`: Sends ICMP Echo Request packets to test network connectivity.
17. `wget`: Downloads files from the internet.
18. `tar`: Archives files into a tarball or extracts files from a tarball.
19. `gzip`: Compresses files using the gzip algorithm.
20. `gunzip`: Decompresses files compressed with gzip.
21. `df`: Displays disk space usage.
22. `du`: Displays disk usage of files and directories.
23. `top`: Displays real-time system resource usage.
24. `ps`: Lists running processes.
25. `kill`: Terminates processes.
26. `history`: Displays command history.
27. `man`: Displays the manual page of a command.
28. `sudo`: Executes a command with superuser (root) privileges.
29. `apt`: Package manager command for Debian-based distributions.
30. `yum`: Package manager command for Red Hat-based distributions.

These are just a few examples of commonly used Linux commands. There are many more commands available, each serving different purposes and functionalities. To learn more about a specific command and its options, you can use the `man` command followed by the command name (e.g., `man ls`).