The log that ate the disk
A journald default and a chatty service are enough to fill a small volume in about six weeks. What I check now, and the two settings that would have made it a non-event.
notes on small systems
Occasional writing about keeping modest amounts of software running without a platform team.
Backups you have actually restored
An untested backup is a hypothesis. A short routine for turning one into a fact, on a schedule you will not resent.
Everything on one box
Where a single small server stops being enough, and where it stops much later than people expect.