Shell levels — type the command that achieves each goal

Daily challenge

Vi Mode — learn the editor by making real edits

A working vi/vim editor. Complete each quest with motions and edits (i, dd, cw, :wq…). XP counts toward your total.

Detective Missions — solve a case across several steps in one live shell

Each mission drops you into a real filesystem with a problem to crack. Complete the steps in order — your commands build on each other. Hints only, no reveal; earn XP for speed.

Review — the game drills what you personally get wrong

Spaced repetition (Leitner boxes): miss a question and it comes back soon; nail it first-try and it waits longer before returning. Review runs award reduced XP and never touch the leaderboard.

Play some levels first — once you've answered questions, the ones you miss show up here to drill.

Type help · reset restores files · Tab completes · Ctrl-L clears · vi file opens the editor · Esc leaves

Type the command that achieves the goal · Tab completes · stuck? press Reveal · Esc to leave

Command reference

Score boards

1. loading…

XP / Progress 💾 local

Achievements

Badges you've earned across all your runs. Earn them once and they stick.

Run complete