Security Research
Poking at systems, reading source, and figuring out how things really work under the hood — then documenting the path back out.
Start at the foundation.
Build all the way up.
The den where dense topics get taken apart and put back together in order — cybersecurity, Linux and NixOS, explained so the concepts actually click.
free · no signup · no fluff · run by Soren Brumbach
23
modules written
2
paths live
6
projects in development
$0
forever
// what i do
Curiosity, weaponized.
Three habits that feed each other: break something open, rebuild it properly, then write down the path so the next person moves faster.
Linux & NixOS
Reproducible systems, dotfiles, and a healthy obsession with declarative configuration. The terminal is home.
Teaching It Forward
Turning dense topics into clear, beginner-friendly write-ups so the next person ramps up faster than I did.
// the curriculum
One trunk. Then you pick a branch.
Most material online drops you in the middle and expects the foundation to fill itself in. Here it runs in order: everything starts at Linux Fundamentals, because every path after it assumes you can read a filesystem, drive a shell and reason about a process.
Once that's solid, the tree forks. The cyber path takes you through networking, traffic, crypto and identity, then splits into building a defense, operating it, and breaking it. The nixos path goes the other way — Nix the language, then NixOS the system, then the graphical stack on top of it.
No prerequisites past curiosity. No account, no paywall, no drip-feed. Every module is a page you can read start to finish in one sitting.
01
Linux Fundamentals
The shell, the kernel, files, permissions, processes, boot, systemd, networking and packages — the shared floor everything else stands on.
then it forks
02
Networking Basics
Addressing, the stack, the handshake, reading real traffic, crypto, identity, logging — the language security is spoken in.
02
Nix Fundamentals
The language and the model behind reproducible systems — derivations, the store, and why any of it is worth the learning curve.
// the den is open
Pick a starting point.
Begin at module zero, jump to whatever you're stuck on, or come see what's being built. Nothing here asks for an email address.