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reset
Reset the current exercise and return to the original environment.
undo
Undoing the previous step can also be done by resetting.
redo
Revert the action just undone.

Enter commands individually in the terminal, or use toolbar buttons.

Terminal shortcut keys
Ctrl+A / E
Move to beginning/end of line
Ctrl+B / F
Move left/right one character
Ctrl+U / K
Cut the content before/after the cursor
Ctrl+W
Cut the word before the cursor (separated by whitespace)
Ctrl+Y
Restore cut content
Ctrl+H / D
Delete the character / before the cursor
Ctrl+P / N、↑ / ↓
Previous/next historical command
Ctrl+C
Cancel current input
Ctrl+L
Clear the terminal display
Tab
Complete command or path

macOS also uses the Control key.

The current exercise history is saved locally and can be exported for backup.

Starting from scratch?

All playthrough records, mastery and review records, local practice self-assessments, collections, practice files, terminal records, and undo/redo history will be cleared. This action cannot be undone.

It is recommended to export the backup first and then restart the exercise. The backup data can then be retrieved through "Import Restore".

Real terminal exercises

Operate from Linux or WSL terminal. Create a temporary exercise directory first; some parameters of macOS are different.

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Welcome to Learn Linux Command
No memorizing long command lists. Try a few small tasks and build your Linux skills as you go!
No installation needed. Everything runs in a simulated environment, so you can experiment safely.