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DAY 04: The Fortress Guardian

Revision history by date

May 17, 2026

PR #726
  • 1Clarified that learners must run newgrp developers before testing access in the developers-only src directory.

May 07, 2026

PR #724
  • 1Updated Step 2 checks to validate recursive user and group ownership for all project files and directories.

Apr 15, 2026

  • 1Clarified Step 4 so learners understand setgid changes group inheritance but not file owner or umask-based file permissions.
  • 2Fixed the Step 4 verification to create a fresh temporary file so repeated checks no longer fail because of stale ownership state.
  • 1Marked Lab as first published.

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