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Practice 06-ssh-keys-and-safe-hardening: Homework

Independent application with evidence.

Show commands for:
Class 21: SSH keys and safe hardening
Class 21 visual reference. Use it as the map, then prove it in the reading, lesson, and lab.

Overview

Module: Linux Foundations
Activity type: Homework / independent application
Objective: Explain the different roles of an SSH private key and public key.

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Requirements

Write a production change plan that includes prerequisites, a second-session test, syntax validation, log monitoring, a decision point, and console rollback. Do not execute it.
Review the authorized_keys(5) documentation for restrict, command, expiry-time, from, and permitopen. Describe one service-account use case for each relevant restriction.
Inventory the public-key fingerprints used by one non-production administrative account. Record ownership, purpose, creation date if known, and proposed retirement date without copying private material.
Compare password authentication, keyboard-interactive authentication, and public-key authentication on the OpenSSH version used in your homelab.
Explain how an SSH agent improves usability and how unrestricted agent forwarding can increase risk.

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Submit / record

  • [ ] Evidence artifacts (secrets redacted)
  • [ ] Spiral connections written
  • [ ] Ready for topic quiz
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