Linux Fundamentals · lesson 1 of 15 · 10 min

Linux fundamentals

summary: Linux is a widely used operating system built around clear permissions, files, and services. Start by observing the system state, using approved accounts, and documenting what you learn in the lab.

question: What is the safest first habit in a Linux lab?

options:

• Observe the current state before changing it
• Run commands copied from strangers
• Delete unfamiliar files
• Use another person’s account

correct: Observe the current state before changing it

explanation: Observation gives you context and helps you make safe, reversible decisions.

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