TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.

How to Make a Computer Operating System in C++

hping network tool

Hide a process under Linux using the ld preloader (https://sysdig.com/blog/hiding-linux-processes-for-fun-and-profit/)

Materials from my Strange Loop 2014 workshop, Let's Build a Shell!

Message-passing kernel + userspace

Some fun things you can do with kernel modules (all "bad ideas")

A minimal toy implementation of strace(1)

A high performance tree-based cache server.

A toy debugger

Lightweight terminal-based multicore CPU usage monitor

lsaddr - list active IP addresses