Generating presentations from Org files is very useful, this note lists how to use Emacs' batch mode to render the presentation from the command line.

Using CoreDNS as a easy to deploy DNS server to host custom domains for development and testing purposes.

Running a local dns server is useful to assign domain names for testing purposes. This note is about running dnsmasq on MacOS.

How to redirect DNS queries for the domain ".test" to a local DNS server like dnsmasq.

Using a locally built image in Kubernetes during development

Flashing an ISO image to an external drive like a USB stick or an SDCard is a common way to get up and running with a new system. The "classic" way of burning this to a CD-ROM is not really in use anymore. Still, many projects do provide images as …

A wrap up of my thoughts around the concept of virtual conferences including first conclusions from comparing to on-site conferences.

Building PDF documents via Sphinx depends of LaTeX being available, this resulted in quite heavy container images which took also very long to build. Out of curiosity I tested to build a minimal Texlive environment based on Nix and got surprisingly nice results, both the image size and the build time dropped significantly.

Small snippet how to run a command with a few extra dependencies inside of the environment in an ad-hoc fashion.

NixOS allows to easily build images of a machine configuration. This post shows in an example how to build a more recent version of the base image which NixOPS uses to spin off Virtualbox based machines. The idea should be applicable to all kinds of machine configurations.