Essential Linux Commands Every Beginner Should Know

Commands are instructions that tell a computer to perform tasks. This tutorial gathers the most useful basic Linux commands for beginners, covering file management, system inspection, and process control across various distributions.

1. ls – List

Lists the contents of the current working directory, similar to opening a folder in a graphical interface.

2. mkdir – Make Directory

Creates a new directory: mkdir <new-directory-name>.

3. pwd – Print Working Directory

Displays the absolute path of the current directory.

4. cd – Change Directory

Changes the current working directory to the specified folder: cd <directory>.

5. rmdir – Remove Directory

Deletes an empty directory: rmdir <directory-name>.

6. rm – Remove

Deletes files or directories. Use rm <file-name> for files and rm -r <directory-name> for recursive directory removal.

7. cp – Copy

Copies files or directories. Example: cp <source-file> <destination-file> or cp -r <source-folder> <destination-folder> for recursive copying.

8. mv – Move

Moves or renames files and directories: mv <source> <destination>.

9. cat – Concatenate and Print Files

Displays the contents of a file on standard output: cat <file>.

10. tail – Print Last Lines

Shows the last 10 lines of a file by default: tail <file-name>. Use tail -n N <file-name> to display the last N lines.

11. less – View File Page by Page

Displays file contents one screen at a time, useful for large files. Navigation keys include Ctrl+F (forward) and Ctrl+B (backward).

12. grep – Search Text

Searches for a string in files: grep "<string>" <file-name>. Options: -i (ignore case) and -r (recursive search).

13. find – Locate Files

Searches for files matching criteria. Example: find <folder> -name <file-name> (case‑sensitive) or find <folder> -iname <file-name> (case‑insensitive).

14. tar – Archive Files

Creates, lists, or extracts tar archives. Examples: tar -cvf <archive.tar> <files> (create), tar -tvf <archive.tar> (list), tar -xvf <archive.tar> (extract).

15. gzip – Compress/Decompress

Compresses files with gzip: gzip <filename>. Decompress with gzip -d <filename>.

16. unzip – Extract ZIP Archives

Extracts zip files: unzip <archive.zip>. Use unzip -l <archive.zip> to list contents before extracting.

17. help – Command Help

Shows a brief help summary for any command: <command> --help or <command> -h.

18. whatis – One‑Line Description

Provides a short description of a command: whatis <command>.

19. man – Manual Pages

Displays the full manual for a command: man <command>.

20. exit – End Session

Closes the current terminal session.

21. ping – Test Network Connectivity

Sends ICMP packets to a remote host to check connectivity: ping <host>.

22. who – Show Logged‑In Users

Lists the usernames of currently logged‑in users.

23. su – Switch User

Switches to another user account: su <username>. Superuser can switch without a password.

24. uname – System Information

Displays kernel name, hostname, version, architecture, etc. Use uname -a for all details.

25. free – Memory Usage

Shows total, used, and free memory, as well as swap. Options: -m for megabytes, -g for gigabytes.

26. df – Disk Space

Shows filesystem disk usage. Use df -h for human‑readable output.

27. ps – Process Status

Displays currently running processes.

28. top – Real‑Time Process Monitor

Shows processes sorted by CPU usage. Use top -u <username> to filter by user.

29. shutdown – Power Off or Reboot

Shuts down the system; use shutdown -r to reboot.

This concise reference equips newcomers with the commands needed for everyday Linux usage, from navigating the filesystem to monitoring system resources and managing processes.