Run systemctl list-units.
systemctl list-units
Mission 193
Capstone service map
Map service status, units, and listeners.
Capstone labssystemctlsslsof
Lesson 193 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 lsof -i.
lsof -i
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Lesson support
What to notice while you play.
Map service status, units, and listeners.
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.
lsof
Show simulated files and sockets opened by services.
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.