Run head -n 2 /var/log/kern.log.
head -n 2 /var/log/kern.log
Mission 53
Kernel log basics
Inspect simulated kernel messages for mount and network clues.
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Lesson 53 of 360
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Text and logs · 7 minutes
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learner@clairos:/home/learner $
Unix ops lab: type a command, press Enter
Instructions
7 minutes
Click any instruction for the command details, the why, and the common mistake to avoid.
Run grep mount /var/log/kern.log.
grep mount /var/log/kern.log
Run tail -n 2 /var/log/kern.log.
tail -n 2 /var/log/kern.log
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Lesson support
What to notice while you play.
Practice reading low-level log text.
Search for mount in kern.log.
Kernel messages can explain storage and network symptoms.
- Treating every kernel line as an emergency.
- Ignoring timestamps.
Reference
Commands in this lesson.
head|tail [-n N] <file>
Read the beginning or end of a file.
grep [-i] <text> <file>
Find literal text inside a file.