A real Linux shell, running in this browser tab.

Practise the command line, bash scripting and git on a genuine Debian system. Nothing to install, no account, and no server doing the work. Press Stop and the whole machine is gone.

Start with

Linux basicsFiles, folders, pipes and grep with a sample projectGit playgroundA repo with history, a branch and a local remoteBash scriptingExample scripts, loops and a CSV to crunchBlank DebianJust a clean shell

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bash — 80×24

user@sandbox:~$ uname -sm
Linux i686
user@sandbox:~$ git log --oneline --graph --all
* 7c1e9a2 (feature/shout) Add shout()
* 4b20d5f (HEAD -> main, origin/main) Add greet()
* 0e93c11 Initial commit
user@sandbox:~$ grep -c ERROR ~/practice/logs/app.log
2
user@sandbox:~$

Runs on your machine

x86 code is compiled to WebAssembly on the fly. No per-user servers.

Ephemeral by design

Every change lives in a per-session layer that is deleted when you stop.

Terminal plus files

A file manager to upload, edit, rename and download what you make.

Built for learning

Guided lessons with one-click commands and automatic task checks.