Interactive Linux Course

Forty-eight hands-on lessons in a real simulated shell. Each lesson gives you a task; the terminal checks what you type and unlocks the next one when you get it right. Your progress is saved in this browser, so you can close the tab and pick up where you left off. The reset button clears it.

The terminal below is a real simulator with its own filesystem: it understands paths, permissions, pipes and redirection, and it answers with the same error messages a real shell would. Nothing you type can break anything, so experiment — rm -rf whatever you like, and reset when you want a clean machine.

Each lesson gives you a task, explains the concept behind it, and checks your command as you type. Stuck? Every exercise has a hint one click away. When you finish, the command reference goes deeper on each command, and the cheat sheet keeps the syntax within reach.