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Understand systems.
Build your defenses.
A clear, practical reference for learning cybersecurity. Explore operating systems, secure networks, and the evidence that tells their stories.
✓ Open knowledge✓ Practical guidance✓ Community contributions
FIND YOUR STARTING POINT
Explore by topic
Accounts, policies, PowerShell, and the foundations of a secure Windows system.
Understand permissions, audit services, and get comfortable at the command line.
Connect the concepts behind networks, from the OSI model to device security.
Follow the evidence through event logs, system artifacts, and careful analysis.
A CLOSER LOOK
Start with the evidence.
Explore forensic concepts and learn how system artifacts can help explain what happened.
Explore the forensics collection →linux · investigation
# Establish a starting point $ journalctl --since today $ last -a $ ss -tulpn
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