linuxplus/RECOVERY.md

RECOVERY maintenance update - 2026-07-09

Created a targeted review lesson pair based on missed Linux+ firewall book questions:

• linuxplus-lesson-120.el
• linuxplus-quiz-120.el

Lesson 120 covers firewall ACLs, packet inspection, persistent configuration files, stateful firewall review points, firewalld runtime to permanent configuration, numbered UFW rules, simple UFW SSH blocking, DenyHosts, and Fail2Ban.

Quiz 120 uses only true/false, yes/no, and single-choice questions. The lesson keeps text above an ansi-term buffer and includes GNU Emacs on GNU/Linux audio practice with espeak-ng and espeak.

Include the book's expected wording, but preserve the real-world note that DenyHosts is strongly associated with /etc/hosts.deny, while Fail2Ban commonly blocks through firewall actions.