Lesson 4: The Ghost in the Machine (Processes)

A Linux server is alive with hundreds of "Processes" running in the background. As a DevOps engineer, you must know how to manage them.

What is a PID?

Every running program has a Process ID (PID). It's like a social security number for the program.

Key Commands

• ps aux: Shows every process running on the system.
• top: A live, moving view of processes (like Task Manager).
• kill: Tells a process to stop immediately.

Mission Objective

There is a background process slowing down our server. Use ps aux to find it, and then try to identify its PID.

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