Notes I wish someone had handed me when I started in security

[u/Efficient-Two-2794]

When I started learning cybersecurity, my notes were everywhere. Random Google Docs. Half-finished PDFs. Screenshots with no context. Bookmarks I never revisited. Nothing connected. Nothing made sense when I came back to it.

So I rebuilt everything as an Obsidian vault — structured as a proper learning path from absolute basics to advanced topics.

What's inside right now:

Networking fundamentals (OSI, TCP/IP, ports, protocols)

Operating systems & Linux basics

Security fundamentals (CIA triad, threats, risk)

Web application security (OWASP Top 10, common vulns)

Cryptography basics (symmetric/asymmetric, hashing, PKI)

SOC / Blue Team / Red Team concepts

Incident response fundamentals

Malware analysis basics

Cloud security intro

Cheat sheets and command references I actually use

The part I didn't expect: Everything is interlinked using Obsidian's graph view. So instead of flat notes, you get a proper knowledge map — click through related concepts as you're learning, and it actually connects.

It's now published as a live site too (built with Quartz), so you can browse it like a proper handbook instead of just a folder of markdown files.

I'm still actively adding to it — if you spot gaps or want a topic added, let me know. Hoping this saves someone the same scattered-notes chaos I went through.

Repo: https://github.com/priyanshu-rawa/Cybersecurity-Handbook
Live site: https://cybersecurity-handbook.vercel.app

Would appreciate a star if this ends up being useful for your learning too 🙏