tmpfs.tech · all tracks · Storage & Disk

Define a LUKS Volume in crypttab

Storage & Disk · medium · solved in-browser (no VM needed) · 3 tiered hints

Write /etc/crypttab: add ONE line that unlocks a LUKS volume. The mapped name is sdb1_crypt, the backing device is given by UUID=, the key file field is none (prompt for the passphrase), and the options field must request the luks type and enable discard (TRIM) passthrough. (Authored config, graded structurally — the engine isn't run here.)

▶ Start this challenge

Nobody has solved this one yet — be the first clear on the leaderboard.

How it works

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.

More Storage & Disk challenges

Files, sizes, mounts, tmpfs, loop devices and recovering from a full disk.

• Add a Sized tmpfs to fstabeasy · in-browser
• Bind-Mount a Directory in fstabeasy · in-browser
• Create a 5 MiB fileeasy
• Create a tarballeasy
• Enable a Swap File in fstabeasy · in-browser
• Extract an archiveeasy
• Find the largest fileeasy
• Is it a mount point?easy

See all Storage & Disk challenges →

FAQ

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.