Mission 143

Test guards

Use test commands as script-style guards.

Shell scripting
8 minutes Advanced Lesson 143 of 360
testecho
Lesson 143 of 360 0/360 lessons 0/17 missions 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.

Check deploy file

Run test -f scripts/deploy.sh.

test -f scripts/deploy.sh
Check scripts directory

Run test -d scripts.

test -d scripts
Write guard note

Run echo guard-reviewed > lab/guard.txt.

echo guard-reviewed > lab/guard.txt
Lesson support

What to notice while you play.

Objective

Use test commands as script-style guards.

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.

echo <text>

Print text or write lab notes with >.

test -e|-f|-d <path>

Check path type in a training-friendly way.