Linux Command Line Foundations for Security

Learn the Linux command line with confidence—without treating your real system like a practice environment.

Linux Command Line Foundations for Security is a free, beginner-friendly Obsidian mini-course built for cybersecurity learners, IT professionals, and anyone who wants practical Linux skills for a home lab.

You’ll learn how to:

• Navigate the Linux filesystem safely
• Create, inspect, search, copy, and organize files
• Understand users, groups, and file permissions
• Inspect processes, services, and system logs
• Manage packages and apply updates thoughtfully
• Check network addresses, routes, DNS, and listening services
• Use a repeatable troubleshooting process and document what you learn

What’s included:

• 9 guided, hands-on lessons
• A quick command reference
• An Obsidian Canvas course map
• Safe lab practices and checkpoints
• Links to official Ubuntu Server and systemd documentation

This course is designed for an Ubuntu Server virtual machine you own or are authorized to administer. It is educational and defensive in focus—no scanning, exploitation, or testing of systems outside your own lab.

Download the ZIP, extract it, and open the folder as a vault in Obsidian. No prior command-line experience required.

Free from Zero Trust Threads.