Mission 162

DNS file review

Inspect resolver configuration as text.

Networking
8 minutes Advanced Lesson 162 of 360
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Lesson 162 of 360 0/360 lessons 0/17 missions Networking · 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.

Read resolver

Run cat /etc/resolv.conf.

cat /etc/resolv.conf
Find nameserver

Run grep nameserver /etc/resolv.conf.

grep nameserver /etc/resolv.conf
Inspect resolver file

Run stat /etc/resolv.conf.

stat /etc/resolv.conf
Lesson support

What to notice while you play.

Objective

Inspect resolver configuration as text.

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.

cat <file>

Print text file contents.

grep [-i] <text> <file>

Find literal text inside a file.