Linux Commands Cheat Sheet

The Linux Commands Cheat Sheet: Every Essential Command at Your Fingertips

Stop searching online every time you need a command. This two-sided, letter-size quick-reference card puts more than 115 of the most-used Linux commands in one place, each with a plain-English explanation. It’s designed to be laminated so it can sit next to your keyboard for years.

What’s included

• The basics:
  • Getting help
  • Keyboard shortcuts for the bash shell
  • Moving between folders
  • Creating, copying, moving and deleting files
  • Viewing files
  • Wildcards
• Finding things: search for files by name, date, type and size with find, and search inside files with grep.
• Permissions and ownership: a simple chart that decodes 755, 644, 700 and 600, plus chmod, chown and sudo.
• Redirection and pipes: save output, append to files, capture errors and chain commands together.
• Text processing: sort, uniq, cut, tr, sed, awk and diff, with a real worked example that finds the top IP addresses in a web log.
• Processes and system information: see what’s running, stop programs, run jobs in the background, and check disk space, memory, CPU and uptime.
• Package managers side by side: apt (Ubuntu and Debian), dnf (Fedora and RHEL) and pacman (Arch) in one comparison table.
• Archives, networking and users: tar and zip, ping, curl, ssh, scp, rsync, open ports, and adding users and groups.
• Advanced section:
  • Managing services and logs with systemctl and journalctl
  • Scheduling jobs with cron, with ready-made timing examples
  • Environment variables and aliases
  • SSH keys
  • A starter bash script

Who it’s for

• Beginners learning Linux for school, work or a home lab.
• IT, cybersecurity and computer science students preparing for exams or certifications.
• Developers, system administrators and help-desk staff who want a fast refresher.
• Raspberry Pi, home server and self-hosting hobbyists.

What makes it great

• Plain English: every command has a short, clear description of what it actually does.
• Easy to scan: commands appear in a clean typewriter-style font, so they’re easy to read and type exactly.
• Works on popular distributions: includes Ubuntu, Debian, Fedora, RHEL and Arch.
• Beginner to advanced: start with ls and cd, then grow into systemd, cron and scripting.
• Real examples: practical one-liners and a sample script you can use right away.
• Safety built in: reminders about permanent deletes, overwriting files and using sudo carefully.