Run printf "release candidate" | tee lab/release-label.txt.
printf "release candidate" | tee lab/release-label.txt
Mission 347
Quoted argument review
Preserve a multi-word value while capturing predictable output.
Shell scriptingprintfteecat
Lesson 347 of 360
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Shell scripting · 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 cat lab/release-label.txt.
cat lab/release-label.txt
Run wc -l lab/release-label.txt.
wc -l lab/release-label.txt
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Lesson support
What to notice while you play.
Build repeatable confidence with keeping one logical value inside one quoted argument.
Start with printf "release candidate" | tee lab/release-label.txt, inspect the result, then continue in order.
Keeping one logical value inside one quoted argument helps operators explain what they know before they change anything.
- Skipping the output that proves keeping one logical value inside one quoted argument.
- Changing several things before recording a baseline.
Reference
Commands in this lesson.
printf <text>
Print formatted training text.
cat <file>
Print text file contents.
tee <file>
Write piped text to a lab file and keep it on screen.