Windows Command Prompt
A free Windows Command Prompt simulator with guided chapters. Practice cd, dir, copy, del, pipes, variables and batch files in a sandbox that can't touch your PC.
C:\> practice17 chapters · free In the forge
Practice shells
A real-feeling command line in your browser, with a pretend disk behind it. Type anything, break everything, reset, repeat.
Linux Terminal
A bash practice terminal for ls, cd, grep, chmod and friends, arriving alongside a future book in the series.