Cybersecurity-Handbook

Open-source cybersecurity knowledge base with 400+ notes, labs, and cheat sheets covering offense, defense, cryptography, cloud, and forensics.

Learn cybersecurity with clarity — from fundamentals to advanced concepts, in one searchable, open-source handbook.

Preview

_{Homepage   ·   Interactive knowledge graph — every note links to related concepts}

_{Reader mode   ·   Dark mode (Catppuccin Mocha)}

_{Fully responsive on mobile}

Why I built this

I've spent a lot of nights doing exactly what you're probably doing right now — reading forums, watching tutorials, trying to piece together what actually matters in security.

Most of what I found fell into one of three buckets: too shallow (a list of tools with no explanation of why they work), too scattered (good content spread across a dozen blogs and paid courses), or priced like a $500 course was the only way in.

So I started writing my own notes — the kind that explain how things work, not just which commands to paste. Over time, those notes grew into this handbook.

I don't have all the answers, but I do think this stuff is learnable when it's explained clearly. If this saves you one late-night rabbit hole, it did its job.

What you get

• 🔍 Instant search across 400+ notes
• 🕸️ Interactive graph — see how topics connect
• 🌗 Light & dark mode, including Catppuccin Mocha
• 📱 Works on any device — phone, tablet, or laptop
• 🎯 First-principles explanations, not just command lists
• 🚫 No ads, no paywalls, no login required

Quick start

Get it running locally in under 2 minutes.

Prerequisites: Node.js v18+ and npm or yarn.

Build for production:

What's covered

A rough learning path, if you're starting from zero:

Contributing

Contributions of all sizes are welcome, from fixing a typo to adding a whole new topic. First time contributing to open source? Happy to walk you through it, just open an issue.

Ways to help:

• 📝 Content — new topics, corrections, clearer explanations
• 🎨 Design — diagrams, layout, visual polish
• 💻 Code — bug fixes, Quartz config, new features
• 📚 Docs — formatting, cross-references, clarity
• 👥 Community — reporting issues, answering questions

Steps:

Where things go:

Support this project

This handbook is free and always will be. If it's helped you, here's what actually makes a difference:

Want to share it? Feel free to copy this:

"Found this free Cybersecurity Handbook with 400+ notes, built with Obsidian + Quartz: https://github.com/priyanshu-rawa/Cybersecurity-Handbook"

If this handbook made a difference for you, a quick note is genuinely appreciated: [email protected]

License

MIT License — see LICENSE for details. Use, modify, distribute, or commercialize freely, as long as the copyright notice stays intact. Contributions back are always welcome.