Run cat data/ports.txt | sort | uniq.
cat data/ports.txt | sort | uniq
Lesson 165 of 360
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Networking · 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 wc -l data/ports.txt.
wc -l data/ports.txt
Run tail -n 3 data/ports.txt.
tail -n 3 data/ports.txt
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Lesson support
What to notice while you play.
Normalize and count port inventory text.
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.
wc [-l] <file>
Count lines, words, and characters.
sort|uniq
Practice simple text pipelines.