Learn DevOps
the easy way.
From your first Linux command to CI/CD, cloud, and Kubernetes. Bite-sized lessons, hands-on challenges, and a safe terminal that runs right in your browser.
- No signup
- Nothing to install
- Free forever
- Lessons
- 75
- Learning tracks
- 9
- Terminal commands
- 141
- Boss levels
- 5
Three steps. Zero setup.
Read a short lesson
From your first
lsto Jenkins pipelines and Kubernetes — focused chapters with real examples, each about five minutes long.Practice in the terminal
A realistic shell with a filesystem, history, and tab completion runs in your browser. Break anything — nothing touches your machine.
Prove it and level up
Solve the challenge, pass the quick quiz, and the lesson is done. Earn points, keep a streak, and unlock badges.
Finish a lesson today to start a streak.
+10 per lesson · +1 per correct quiz answer · +25 per boss
Tools for self-directed learners.
Terminal
A free-practice shell in your browser. Try what a lesson taught you, break it, rebuild.
OpenBoss levels
Multi-step scenarios: fix a broken service, sort a messy log folder, and more.
OpenFlashcards
Spaced repetition for every terminal command, so they stick for good.
OpenTyping test
Type real shell commands against the clock. 30 WPM earns a badge.
OpenCheatsheet
A searchable reference of every command the terminal supports.
OpenExplain a command
Paste a one-liner and get every command, flag, pipe, and redirect explained.
OpenAchievements
Badges for streaks, perfect quizzes, boss runs, typing speed, and more.
OpenProfile & backup
Lifetime stats, an activity heatmap, and export or import of your progress.
OpenAnyone going from terminal novice to DevOps-ready.
- Beginners who have never opened a terminal.
- Developers who want to be comfortable on a server.
- Anyone preparing for a DevOps, cloud, or SRE role.
Open the first lesson
A five-minute warm-up. All you need is a keyboard.