Reclaim the Disk

Prune dead containers and dangling images without touching production.

A beginner Docker challenge worth 3 points. Solve it hands-on in a real Docker environment in your browser - no local setup, no fake shells.

The Challenge

Scenario: Monitoring says this Docker host is running out of disk. Old deploys left stopped containers and dangling images everywhere.

Tasks:

• Inspect the damage: docker ps -a, docker images -f dangling=true, docker system df
• Remove all stopped containers and all dangling images
• The running container app is production — it must survive

Commands to learn: docker container prune, docker image prune, docker system df

Run check when done.