cobalt notes from a small home lab

Notes

Things I had to figure out for the machines at home. Newest first.

2026

Restic to this box over SFTP: the setup I ended up with2026-08-30 · For two years my off-site backup was a USB disk at my parents' place. It worked until it didn't: the disk was…
What I do when a ZFS scrub finds errors2026-07-12 · Monthly scrub on the first Sunday. For a year the mail said 0 errors and I stopped reading it. Then it didn't.
Home Assistant: moving a Pi 4 from SD card to SSD2026-05-03 · The SD card lasted 26 months, which is honestly more than I expected with the recorder writing every few…
Wake-on-LAN from a phone without opening any ports2026-03-16 · The desktop at home sleeps most of the day. I want to wake it from wherever I am, and I do not want a port…
Nginx as a plain static host: the whole config2026-01-25 · This site is a directory of HTML files and a config that fits on one screen. I keep reinventing this every…

Watching a 3D printer with Klipper and a cheap webcam2025-11-09 · A print that fails at hour two and keeps extruding for five more is the most expensive way to make spaghetti…
Unattended upgrades that actually reboot at night2025-09-21 · Every Debian box I run has unattended-upgrades. Half of them had been waiting for a reboot for months…