Ethical Hacking & Pen Testing
Learning how attacks work through legal, practice-only labs.
Beginner
Start here. No background needed beyond school maths.
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Beginner
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Kali Linux Documentation
How to install and use Kali, the Linux distribution packed with security testing tools.
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Beginner
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OverTheWire Wargames
Learn Linux and security by solving levels over SSH. Bandit is the classic first game.
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Beginner
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picoCTF
A free capture-the-flag platform built for students, with beginner puzzles all year.
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