Mission 105

Command composition review

Combine printing, tee, and reading a local note.

Terminal basics
8 minutes Core Lesson 105 of 360
printfteecat
Lesson 105 of 360 0/360 lessons 0/17 missions Terminal basics · 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.

Write through tee

Run printf terminal-check | tee lab/terminal-check.txt.

printf terminal-check | tee lab/terminal-check.txt
Read tee output

Run cat lab/terminal-check.txt.

cat lab/terminal-check.txt
Count note lines

Run wc -l lab/terminal-check.txt.

wc -l lab/terminal-check.txt
Lesson support

What to notice while you play.

Objective

Combine printing, tee, and reading a local note.

Hint

Run the commands in order and compare the outputs.

Why it matters

Junior operators build confidence by gathering evidence before changing systems.

Common mistakes
  • Skipping the inspection step.
  • Assuming one command tells the whole story.
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.