Linux is a powerful and flexible operating system that is widely used in various environments, from personal computers to servers. For beginners, navigating through Linux can be daunting due to its command-line interface. However, with the right set of commands, you can quickly become proficient in managing your Linux system. This beginner Linux command cheat sheet covers essential commands that will help you get started and become more comfortable using Linux.
Getting Started Beginner Linux Command Cheat Sheet Free
Before diving into the commands, it’s important to understand the terminal, the command-line interface used to interact with the Linux operating system. You can open the terminal in most Linux distributions by pressing Ctrl + Alt + T.
Basic Commands
1. pwd (Print Working Directory)
Displays the current directory you are in.
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pwd2. ls (List)
Lists files and directories in the current directory.
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lsOptions:
ls -l: Lists files in long format.ls -a: Lists all files, including hidden ones.
3. cd (Change Directory)
Changes the current directory.
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cd /path/to/directorycd ~: Changes to the home directory.cd ..: Moves up one directory level.
4. mkdir (Make Directory)
Creates a new directory.
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mkdir new_directory5. rmdir (Remove Directory)
Deletes an empty directory.
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rmdir directory_name6. rm (Remove)
Deletes files or directories.
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rm file_nameOptions:
rm -r directory_name: Deletes a directory and its contents recursively.
7. touch
Creates an empty file or updates the timestamp of an existing file.
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touch new_file8. cp (Copy)
Copies files or directories.
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cp source_file destination_fileOptions:
cp -r source_directory destination_directory: Copies directories recursively.
9. mv (Move)
Moves or renames files or directories.
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mv old_name new_name10. cat (Concatenate)
Displays the contents of a file.
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cat file_name11. nano
Opens the Nano text editor to edit files.
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nano file_nameSystem Information
12. uname
Displays system information.
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uname -a13. top
Shows real-time system processes and resource usage.
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top14. df (Disk Free)
Displays disk space usage.
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df -h15. du (Disk Usage)
Shows the size of a directory and its contents.
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du -sh directory_name16. free
Displays memory usage.
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free -hFile Permissions
17. chmod (Change Mode)
Changes file permissions.
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chmod 755 file_name18. chown (Change Owner)
Changes file owner and group.
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chown user:group file_nameSearching and Finding Files
19. find
Searches for files in a directory hierarchy.
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find /path/to/search -name file_name20. grep (Global Regular Expression Print)
Searches for a pattern within files.
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grep "pattern" file_nameOptions:
grep -r "pattern" /path/to/search: Recursively searches within a directory.
Network Commands
21. ping
Checks connectivity to a host.
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ping host_name_or_ip22. ifconfig
Displays network configuration.
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ifconfig23. wget
Downloads files from the internet.
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wget http://example.com/file24. ssh (Secure Shell)
Connects to a remote server securely.
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ssh user@hostProcess Management
25. ps (Process Status)
Displays currently running processes.
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ps aux26. kill
Terminates a process by PID (Process ID).
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kill PIDOptions:
kill -9 PID: Forcefully terminates a process.
Package Management
27. apt-get
Manages packages on Debian-based systems (like Ubuntu).
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28. yum
Manages packages on Red Hat-based systems (like CentOS).
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29. dpkg
Manages Debian packages.
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sudo dpkg -i package_name.deb30. rpm
Manages Red Hat packages.
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sudo rpm -i package_name.rpmText Processing
31. head
Displays the first few lines of a file.
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head file_name32. tail
Displays the last few lines of a file.
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tail file_nameOptions:
tail -f file_name: Follows the file, displaying new lines as they are added.
33. wc (Word Count)
Counts lines, words, and characters in a file.
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wc file_name34. sort
Sorts lines of text files.
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sort file_name35. uniq
Removes duplicate lines from a sorted file.
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uniq file_nameArchiving and Compression
36. tar
Archives files into a tarball.
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tar -cvf archive_name.tar file_or_directoryOptions:
tar -xvf archive_name.tar: Extracts a tarball.
37. gzip
Compresses files.
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gzip file_name38. gunzip
Decompresses files.
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gunzip file_name.gzUser Management
39. adduser
Adds a new user.
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sudo adduser user_name40. passwd
Changes a user’s password.
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passwd user_name41. usermod
Modifies a user account.
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sudo usermod -aG group_name user_name42. deluser
Deletes a user.
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sudo deluser user_name43. whoami
Displays the current logged-in user.
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whoamiDisk Management
44. mount
Mounts a file system.
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sudo mount /dev/sdX /mnt45. umount
Unmounts a file system.
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sudo umount /mnt46. fsck (File System Check)
Checks and repairs a file system.
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sudo fsck /dev/sdXSystem Monitoring
47. uptime
Displays how long the system has been running.
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uptime48. dmesg (Display Message)
Displays system messages.
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dmesg49. journalctl
Views systemd logs.
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sudo journalctl50. htop
Interactive process viewer.
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htopConclusion
This beginner Linux command cheat sheet provides a foundation to help you navigate and manage your Linux system. As you become more comfortable with these commands, you’ll be able to perform a wide range of tasks more efficiently. Remember, practice is key to mastering Linux, so don’t hesitate to experiment with these commands and explore further. Happy learning!
