ZFS snapshotting done better

How I improved the ZFS snapshotting setup I've been using since forever.

Replacing APC Smart-UPS SC450RM battery

How to replace the UPS battery without causing an outage.

Leveling the Průša Core One+ bed

A long and winding road to having an acceptable bed on my new 3d printer (Průša Core One+), despite a huge design / part flaw.

Swisscom 2025 security.txt challenge: full writeup

Brief and very complete writeup about how I procrastinated for a few hours.

Visualize those pesky rainbows (interactively)

A quick addendum to the previous post, an interactive rainbow visualizer.