Mission 136

SSH key fingerprint

Read a simulated key fingerprint.

Security administration
8 minutes Admin Lesson 136 of 360
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learner@clairos:/home/learner $ Unix ops lab: type a command, press Enter
Instructions 8 minutes

Click any instruction for the command details, the why, and the common mistake to avoid.

Fingerprint key

Run ssh-keygen -lf ~/.ssh/authorized_keys.

ssh-keygen -lf ~/.ssh/authorized_keys
Inspect key file

Run stat ~/.ssh/authorized_keys.

stat ~/.ssh/authorized_keys
Confirm key file

Run test -f ~/.ssh/authorized_keys.

test -f ~/.ssh/authorized_keys
Lesson support

What to notice while you play.

Objective

Read a simulated key fingerprint.

Hint

Run the commands in order and compare the outputs.

Why it matters

Junior operators build confidence by gathering evidence before changing systems.

Common mistakes
  • Skipping the inspection step.
  • Assuming one command tells the whole story.
Reference

Commands in this lesson.

stat <path>

Show lab file details.