The VM whose clock ran eleven seconds fast
chrony, a paused hypervisor and why makestep exists.
Short write-ups of things I had to figure out twice. Mostly Linux, networks and small home-lab hardware.
MTU is always the answer (until it is not)
Tunnels, PPPoE and finding the one hop that silently drops big packets.
Backups I actually restore from
restic, a cheap storage box and a monthly restore drill that keeps me honest.