Run awk '{print $1}' /var/log/auth.log.
awk '{print $1}' /var/log/auth.log
Mission 113
Awk column extraction
Use awk to pull simple columns from logs.
Text and logsawkjournalctl
Lesson 113 of 360
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Text and logs · 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 awk '{print $5}' /var/log/auth.log.
awk '{print $5}' /var/log/auth.log
Run journalctl -u ssh | awk '{print $5}'.
journalctl -u ssh | awk '{print $5}'
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Lesson support
What to notice while you play.
Use awk to pull simple columns from logs.
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.
awk '{print $N}' <file>
Print a whitespace-delimited field.
journalctl -u <service>
Read simulated service journal entries.