System & Network Admin

The `du` command in Linux is a utility for analyzing and reporting disk usage of directories and files, offering various options to customize its output for effective storage management.

Cubic simplifies the creation of custom Linux distributions based on Ubuntu or Debian by providing a GUI and virtual terminal environment for customizing ISO images

One of the very few things that irritates me about TailScale is that it uses ULA addressing and doesn’t allow for custom address block definitions (i.e., I can’t use my own GUA block). While this is definitely a “me problem”, it is something that is irksome to me nonetheless. So, in order to get access to my systems over TailScale, over IPv6, I created this python script to grab the v6 addresses and put them into a format conducive to, say, an internal BIND view, or pihole (v5).

The Mathboard is a macropad that makes it easier to write equations on a computer. It is intended for engineers, scientists, and anyone else who regularly need to write equations. The Mathboard is …

If you spend a lot of time at the command line, you probably have either a very basic prompt or a complex, information-dense prompt. If you are in the former camp, or you just want to improve your …

How to create, activate, use, and delete a Python venv on Windows, Linux, and MacOS. We'll also look at how a Python venv works internally.

A deep dive into how managing my dotfiles has (not) evolved over the last 10 years.

My notes about open source stuff.

Master traffic redirection with our Caddy tutorial. Set up Caddy as a reverse proxy and quickly streamline access to your services.

In this guide, I'll walk through the process of setting up a Caddy reverse proxy using Docker and Docker Compose. Caddy is a powerful web server that comes with built-in support for automatic HTTPS, making it an excellent choice for hosting reverse proxies. Docker and Docker Compose provide a consistent

When a spam message gets past my shields and lands in my inbox, the first thing I do is look at the SpamAssassin headers to see if some rule fired whose priority I should bump up. Usually the answer is "Uggggghhhhhh no". It used to be that my second step was to add another phrase to the "body" rule (recent hits include "eligible for Verified Badge", "Qatari Investor", "Construction ...

Installing Python and related applications on a system without a network connection isn’t easy, but you can do it. Here’s how.

Systemd is a service manager for Linux; a drop-in replacement for the init process, and the systemctl command is the primary tool to manage systemd.

To prevent downtime, administrators can configure services to restart automatically whenever they fail, which is especially useful for web servers and databases

Warp has many features, including AI, whereas Ghostty is lightweight out of the box. Our guidance on which terminal app is best for you.

You can argue if bash is a good programming language or not, but you can’t argue that it is a programming language. However, there are a few oddities about it that make it different from most…

Generate random words, nouns, verbs, adjectives, letters, phrases, sentences or numbers to brainstorm and create new ideas at Random Word Generator.

Configure a Wireguard VPN tunneling IPv6 traffic on Linux by setting up an NDP proxy with Shorewall.

A routing protocol suitable both for wireless mesh networks and ordinary wired networks.

Learn to configure a secure, private mesh VPN using WireGuard®. Ideal for connecting multiple servers in a network without a central server.

What is CRXN? How does CRXN work? What are the goals of CRXN? Where can I find more information?

Instructions with example how to use WireGuard for a peer-to-peer connection. Preshared keys (PSK), wg-quick, integration in Systemd, key generation as well as dynamic and non-reachable peers are covered.

Example with explanations how to configure babeld.

In recent years, mesh networking has become a popular method of creating decentralized communication systems, […]

WireGuard is an advanced and modern VPN protocol with powerful cryptography. It is a simple, fast...

Explaining my home lab setup

Explains Linux and Unix bash/ksh shell scripting technique to convert uppercase to lowercase, including text files or variables.