DAILY
Today's broken server
One new broken server a day, the same for everyone. Fix it, then share your time without spoilers.
Take today's incident
A new one every day at midnight · opens after Level 7
root@docker-lab:~# arcade --list
The Arcade
Broken servers to fix, a new incident every day, quick warm-ups and whole islands of levels. Free, in your browser, nothing to install.
- 6incidents
- 22levels
- 1new incident every day
Today
WARM-UP
3 quick questions
Commands you learned come back right before you would forget them. About 2 minutes.
Start the warm-up ›Everything you can play
- DAILYopens after Level 7 Daily Incident One broken production server a day, the same for everyone. Find out what went wrong with real Docker commands, fix it and share your time. ~5–15 minchanges dailyDockerPlay ›
- WARM-UP Warm-up The commands you already learned come back right before you would forget them. Three quick questions, about two minutes a day. ~2 mineasyLinuxPlay ›
- INC-101opens after Level 7 The shop is down On-call incident: the server rebooted at night and the shop never came back. Find the stopped container and get the orders flowing again. 5 min targeteasyDockerPlay ›
- INC-102opens after Level 8 Welcome to nginx?! On-call incident: the shop shows a default nginx page instead of the real site. Someone left a test container holding the port. 5 min targeteasyNetworkingPlay ›
- INC-103opens after Level 8 Database unreachable On-call incident: the app is running, but it cannot reach its database. Find out which network is missing and connect them. 7 min targetmediumNetworkingPlay ›
- INC-104opens after Level 10 Bad deploy On-call incident: a new version went out and the shop crashes on start. Restarting will not help. Roll back to the version that worked. 6 min targetmediumDockerPlay ›
- INC-105opens after Level 9 The data vanished On-call incident: after a restart every order is gone. The data is not lost, it is in a volume the database is no longer using. 7 min targethardDockerPlay ›
- INC-106opens after Level 11 Compose half up On-call incident: only half of the Compose stack is up and the database refuses to start. Find out what a cleanup script removed and bring the stack back. 8 min targethardDockerPlay ›
- LEVELS 1–5 Linux Island Where everyone starts: folders, files, copying, moving and reading them in a terminal. Free, in your browser, no account needed. 5 levelseasyLinuxPlay ›
- LEVELS 6–11 Docker Harbour Your first container, then its life cycle, ports and networks, volumes, your own images and Docker Compose. Free, nothing to install. 6 levelseasyDockerPlay ›
- LEVEL 12 Sandbox Atoll No missions, no clock: a Linux machine with Docker where you can try anything you like. Nothing can break and nothing runs on your computer. 1 leveleasyDockerPlay ›
- LEVELS 13–22free account Linux Highlands Permissions, processes, finding files, text tools, archives, SSH keys, services, cron and users on a real-looking server. Free with an account. 10 levelsmediumLinuxPlay ›
Got an idea for a challenge?
Tell us what you would like to practise. The best ideas become the next ones.