Run uptime.
uptime
Mission 190
Troubleshooting checkpoint
Complete a focused triage loop.
Troubleshootinguptimesystemctljournalctltee
Lesson 190 of 360
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Troubleshooting · 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 systemctl status nginx.
systemctl status nginx
Run journalctl -u nginx -n 2.
journalctl -u nginx -n 2
Run printf triage-complete | tee lab/triage.txt.
printf triage-complete | tee lab/triage.txt
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Lesson support
What to notice while you play.
Complete a focused triage loop.
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.
tee <file>
Write piped text to a lab file and keep it on screen.
systemctl status <service>
Inspect simulated service status.
journalctl -u <service>
Read simulated service journal entries.