Run ss -tulpn.
ss -tulpn
Mission 343
Exposed service inventory
Compare listeners, firewall policy, and enabled service units.
Security administrationssufwsystemctl
Lesson 343 of 360
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Security administration · 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 ufw status verbose.
ufw status verbose
Run systemctl list-units.
systemctl list-units
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Lesson support
What to notice while you play.
Build repeatable confidence with reconciling exposed ports with intended services.
Start with ss -tulpn, inspect the result, then continue in order.
Reconciling exposed ports with intended services helps operators explain what they know before they change anything.
- Skipping the output that proves reconciling exposed ports with intended services.
- Changing several things before recording a baseline.
Reference
Commands in this lesson.
systemctl status <service>
Inspect simulated service status.
ss|ip
Inspect simulated sockets and addresses.
ssh|scp|ssh-keygen
Practice SSH inspection and dry-run transfer shapes without network access.
ufw status
Inspect simulated firewall rules.