Paths/DevOps Engineer/Docker / Logs & Inspection
Capture Container Output
Run the app, capture its logs into a file with shell redirection and verify the port it listens on. Reading container output is the first step of debugging any container.
Validator
⏱ 0:00
IDLE — checks run live as you type commands; submit when done
01Requirements
live checks- A container from app:latest is running○
- File ~/report/container.log exists containing the container's output○
02Walkthrough
1 of 5 revealed- 01
Start the app container
Detached with no port mapping — logs are the focus here, not networking.
docker run -d app:latest - 4 locked · each failed submit reveals one
03Stuck?
0 of 3 revealedTake a hint without losing the lab — each one points at the thing to look at, not at the answer.
04AI Tutor
guides, never solvesTell me what you're stuck on — I'll nudge, not solve. Which requirement are you looking at?
04Notebook
saved locally in this browserlearner@lab — docker:24
Session is disposable
↑/↓ recalls commands · Ctrl+Enter submits · type help for the command list