Operation Unknown Host
You have an unprivileged shell on an unfamiliar Linux machine. Fingerprint it, establish your access, find three security-relevant anomalies, and document what you observed.
Work only inside the disposable container. Do not mount host folders. Investigation is read-only: identify and explain findings without changing permissions or deleting evidence.
- Verify all six mission answers
- Explain why each anomaly matters
- Complete an after-action report
Launch the real lab
docker build -t praneeth-linux-lab-01 labs/linux-fundamentals docker run --rm -it --network none --hostname unknown-host praneeth-linux-lab-01
Run these from the portfolio repository root. The Debian 12 container starts unprivileged, has no network, ports, or host mounts, and disappears when you exit.
Fingerprint the host
Start with situational awareness. Identify the distribution without trusting the hostname or terminal prompt.
cat /etc/os-releaseHint 1: Look for a machine-readable key rather than the marketing name.
After-action report
Write what you observed in professional language. This is saved only in your browser and is never sent to the site.