What are some commonly used Linux system commands?

There are many commonly used Linux system commands, here are some of them:

1. Change directory.
2. List the contents of the directory.
3. pwd: displays the path of the current working directory.
4. mkdir: create directory
5. rmdir: remove directory
6. Create an empty file using touch command.
7. rm: remove files or directories
8. cp: copy files or directories
9. mv: moving files or directories
10. cat: View the contents of a file or concatenate the contents of a file to another file.
11. View file content page by page.
12. grep: Search for matching strings in a file.
13. search for files in the file system
14. Top: Displaying the processes and resource usage in the system.
15. Display the processes of the current user.
16. terminate a process
17. Change the permissions of a file or directory using chmod.
18. chown: change the owner of a file or directory
19. change the group ownership of a file or directory
20. tar: compressing and decompressing files
21. compress files using gzip
22. unzip: decompressing files
23. SSH: Log in to a remote host using a secure encrypted connection.
24. SCP: Copying files between a local host and a remote host.
25. wget: download files from the internet
26. ifconfig: View and configure network interface information.
27. ping: testing the network connection with another host
28. Netstat displays information about network connections, routing tables, and network interfaces.
29. iptables: Setting up firewall rules
30. systemctl: managing system services

This is just a small portion of common Linux commands; there are many other commands used for various purposes.