Mission 220

Retention evidence review

Compare active and rotated logs before retention decisions.

Text and logs
8 minutes Advanced Lesson 220 of 360
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Lesson 220 of 360 0/360 lessons 0/17 missions 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.

Size log tree

Run du -sh /var/log.

du -sh /var/log
Find log files

Run find /var/log -name log.

find /var/log -name log
Count rotated errors

Run wc -l /var/log/nginx-error.log.1.

wc -l /var/log/nginx-error.log.1
Lesson support

What to notice while you play.

Objective

Compare active and rotated logs before retention decisions.

Hint

Run the commands in order and compare the outputs.

Why it matters

Junior operators build confidence by gathering evidence before changing systems.

Common mistakes
  • Skipping the inspection step.
  • Assuming one command tells the whole story.
Reference

Commands in this lesson.

wc [-l] <file>

Count lines, words, and characters.

find [path] [-name text]

Search lab filesystem paths.