Learn Linux
the easy way.
Bite-sized lessons, hands-on challenges, and a safe in-browser terminal. No signup. No install. Just open the site and start typing commands.
5 lessons available · free forever · your progress is saved on this browser
Three steps. One sandbox.
Step-by-step lessons
From your first `ls` to systemd and shell scripting — short chapters with real examples you can read in 5 minutes.
Live terminal sandbox
Practice in a safe, simulated shell right in your browser. Realistic prompt, file system, and history. Nothing touches your machine.
Quizzes & tracking
Answer quick questions at the end of each lesson. Pass 80% and the lesson is marked complete. Your progress saves automatically.
Best streak so far: 0 days.
+10 points per lesson, +1 per correct quiz answer. Missing a day resets the streak to 1.
New tools for self-directed learners.
Cheatsheet
A searchable reference of every command the in-browser sandbox supports, with examples and category filters.
OpenBoss levels
Multi-step challenges — restore a broken service, sort a messy log folder, and more. Sandbox resets between steps.
OpenTyping test
Practice typing real shell commands against the clock. Hit 30 WPM to earn the Fast-fingers badge.
OpenAchievements
Earn badges for streaks, perfect quizzes, bookmarks, notes, boss runs, and typing speed. Pure browser-side.
OpenProfile & backup
Lifetime stats, plus export and import for moving your progress between browsers.
OpenStreaks & points
Earn 10 points per completed lesson and 1 per correct quiz answer. Keep the streak alive by showing up daily.
OpenFor anyone who wants to feel at home on a Linux box.
- Beginners who have never opened a terminal.
- Developers who want to be comfortable on a server.
- Students preparing for DevOps, cloud, or sysadmin roles.
Open the first lesson
A 5-minute warm-up. You only need a keyboard.