Linux CLI Basics

In cyber security, Linux is everywhere, powering servers, security tools, and even hacking environments. However, before you can defend systems or investigate incidents, you need to know how to navigate the Linux OS using the command-line interface (CLI). This room takes you on a guided mission as a brand-new intern in a cyber security team. We will explore the absolute basics of Linux CLI through hands-on tasks, simple missions, and beginner-friendly explanations.

By the end of this task, you'll understand what the terminal is, why it matters, and how you'll use it throughout the room.

Learning Objectives

• Understand what the Linux terminal is and what it's used for.
• Feel comfortable interacting with the Linux environment.
• Navigate through the Linux filesystem with basic commands.

Prerequisites

• Operating Systems: Introduction
• Windows Basics

Storyline: Your First Day on the Job

Congratulations, today is your first day as an IT Support Engineer with the Cyber Operations Support Team. You were supposed to get a proper introduction and a tour of the tools you'll be using, but things in this field don't always go as planned.

Your supervisor left in a hurry to deal with an urgent incident. Before they ran out the door, they left you a short note on your desk:

So here you are on your own for now, faced with a terminal prompt and a bit of mystery. Don't worry, though. Each step in this room will guide you through exactly what to do. You'll learn how to move around the system, read files, and gather information - the same basic skills that cyber security professionals use every day.

Ready to begin?