Build the filesystems and permissions specification

Objectives

The control owner calls the current summary complete because every field has a label. Several labels confuse a technical mechanism with assurance, and missing observations have been treated as passing.

Use the fixture as the authoritative requirement. Replace the empty fields with typed, testable values and identify the evidence needed to substantiate the claim. Do not copy the owner's optimistic summary.

Private report: owner read/write, group read, others none. Parent: owner full, group read/traverse, others none. No privilege-changing execution bit is allowed. Record effective ACL and parent directory.

Step-by-step hints

The guided walkthrough, in full. It is free: no XP cost, and it does not touch the paid hint ladder or the reveal gate.

1. Step 1

   Check file mode

   Find the corresponding requirement in the fixture, distinguish an observed fact from an approved limit, and verify the field type and units before submitting. For narrative evidence, name both the technical observation and its independent supporting record.

   File mode meets the incident requirement

2. Step 2

   Check directory mode

   Find the corresponding requirement in the fixture, distinguish an observed fact from an approved limit, and verify the field type and units before submitting. For narrative evidence, name both the technical observation and its independent supporting record.

   Directory mode meets the incident requirement

3. Step 3

   Check setuid

   Find the corresponding requirement in the fixture, distinguish an observed fact from an approved limit, and verify the field type and units before submitting. For narrative evidence, name both the technical observation and its independent supporting record.

   Setuid meets the incident requirement

4. Step 4

   Check evidence

   Find the corresponding requirement in the fixture, distinguish an observed fact from an approved limit, and verify the field type and units before submitting. For narrative evidence, name both the technical observation and its independent supporting record.

   Evidence meets the incident requirement

Rules summary

• XP on pass

  40 bonus XP the first time every check goes green.

• Paid hints

  2 available. Each costs 25% of the lab XP (about 10 XP).

• Reveal solution

  Scores 0 XP and unlocks only after 3 check runs.

• Attempt cap

  60 check runs per learner. The runner warns you in the last 10.

• Drafts

  Your editor content is saved in this browser, so a reload will not lose work.

• Walkthrough

  Always free and never penalised: use it before spending a hint.