Run cat data/ports.txt | sort | uniq.
cat data/ports.txt | sort | uniq
Mission 50
Port text review
Read, sort, and count a training port list.
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Lesson 50 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 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.
Use simple text tools on a small list.
Compare sorted unique output with the line count.
Admin work often includes tiny text inventories.
- Assuming a list has no duplicates.
- Counting before deduplicating when uniqueness matters.
Reference
Commands in this lesson.
wc [-l] <file>
Count lines, words, and characters.
sort|uniq
Practice simple text pipelines.