Computer Science & Engineering Repository

Dixl Developer Lexicon

Definitive Computer Science Specifications, Linux How-To Guides & System Architecture.

Linux Howto

Configuring UFW Firewall on Ubuntu & Debian: A Field Guide

I stared at the sysadmin ticket at 4:42 PM on a Friday. The client had just deployed a fresh Debian instance into production, left...

Oct 26, 2026 Inspect Spec →

Linux Howto

A junior sysadmin dumped their private SSH key into a public GitHub repository at 4:45 PM on a Friday. By 5:12 PM, automated scrapers...

Oct 26, 2026 Inspect Spec →

Linux Howto

I am looking at a deployment audit right now where a junior dev pulled down a default package manager bundle at 4:45 PM on...

Oct 26, 2026 Inspect Spec →