Defense & IR · medium · solved in-browser (no VM needed) · 3 tiered hints
Write /etc/sudoers.d/10-logging to capture a full audit trail of sudo use. Use Defaults lines to enable log_input and log_output (so keystrokes and output are recorded), point session transcripts at a directory with iolog_dir=, and force a real TTY with use_pty. (Authored config, graded structurally — the engine isn't run here.)
▶ Start this challengeNobody has solved this one yet — be the first clear on the leaderboard.
Open the challenge and an in-page editor appears — write your answer and tmpfs.tech grades it server-side against the same checks a real box would run. No VM, no install, no signup needed to try.
Incident response: evict rogue accounts, eradicate persistence, attribute a breach.
See all Defense & IR challenges →
Is it free? Yes — play as a guest, no signup required to start.
Do I need to install anything? No. Everything runs in your browser.
How is it graded? Automatically and deterministically — your work is checked against the exact rules the live box would apply.