Run echo alpha beta beta | wc.
echo alpha beta beta | wc
Mission 12
Text pipelines
Use safe simulated pipes to count, sort, and deduplicate text output.
Text and logsechosortuniqwc
Lesson 12 of 360
0/360 lessons
0/17 missions
Text and logs · 9 minutes
New learnerrank
0XP
0%complete
learner@clairos:/home/learner $
Unix ops lab: type a command, press Enter
Instructions
9 minutes
Click any instruction for the command details, the why, and the common mistake to avoid.
Run cat /home/learner/data/ports.txt | sort | uniq.
cat /home/learner/data/ports.txt | sort | uniq
Run echo pipeline-practice > lab-pipeline.txt.
echo pipeline-practice > lab-pipeline.txt
Save progress
Keep learning across sessions.
Create a free account to sync completed lessons, XP, streaks, course status, and your next lesson across sessions.
Checking account status...
Progress sync is idle.
0XP
New learnerrank
0day streak
0best streak
0daily streak
0lessons
0courses
0missions
0tasks
Noverified
Progress sync stores completion IDs, scores, streaks, badges, and game settings. Terminal contents, editor snippets, lab scratch, email, and real names are never published on leaderboards or share cards.
Lesson support
What to notice while you play.
Understand how one command's output can become another command's input.
Use echo with quoted words before trying cat with a pipe.
Pipelines make terminals powerful, but this lab keeps them tightly limited.
- Trying shell operators that are not part of the simulator.
- Expecting pipes to run arbitrary programs.
Reference
Commands in this lesson.
echo <text>
Print text or write lab notes with >.
wc [-l] <file>
Count lines, words, and characters.
sort|uniq
Practice simple text pipelines.