Run grep PermitRootLogin /etc/ssh/sshd_config.
grep PermitRootLogin /etc/ssh/sshd_config
Mission 199
Capstone hardening review
Tie hardening settings to exposure and identity.
Capstone labsgrepsswhoami
Lesson 199 of 360
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Capstone labs · 8 minutes
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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.
Run ss -tulpn.
ss -tulpn
Run whoami.
whoami
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Lesson support
What to notice while you play.
Tie hardening settings to exposure and identity.
Run the commands in order and compare the outputs.
Junior operators build confidence by gathering evidence before changing systems.
- Skipping the inspection step.
- Assuming one command tells the whole story.
Reference
Commands in this lesson.
grep [-i] <text> <file>
Find literal text inside a file.
whoami|id|groups
Inspect the learner account.
ss|ip
Inspect simulated sockets and addresses.
ssh|scp|ssh-keygen
Practice SSH inspection and dry-run transfer shapes without network access.