Mission 227

Known hosts review

Inspect known_hosts as sensitive SSH context.

Permissions and users
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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.

Read known hosts

Run cat ~/.ssh/known_hosts.

cat ~/.ssh/known_hosts
Inspect mode

Run stat ~/.ssh/known_hosts.

stat ~/.ssh/known_hosts
Find lab host

Run grep clairos ~/.ssh/known_hosts.

grep clairos ~/.ssh/known_hosts
Lesson support

What to notice while you play.

Objective

Inspect known_hosts as sensitive SSH context.

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.

cat <file>

Print text file contents.

grep [-i] <text> <file>

Find literal text inside a file.

stat <path>

Show lab file details.