Run grep denied /var/log/auth.log | awk '{print $5}'.
grep denied /var/log/auth.log | awk '{print $5}'
Mission 118
Text pipeline checkpoint
Combine search, field extraction, transform, and counting.
Text and logsgrepawktrwc
Lesson 118 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 printf incident | tr a-z A-Z.
printf incident | tr a-z A-Z
Run grep denied /var/log/auth.log | wc -l.
grep denied /var/log/auth.log | wc -l
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Lesson support
What to notice while you play.
Combine search, field extraction, transform, and counting.
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.
grep [-i] <text> <file>
Find literal text inside a file.
awk '{print $N}' <file>
Print a whitespace-delimited field.
tr a-z A-Z
Transform piped text case.
wc [-l] <file>
Count lines, words, and characters.