It's down now. I'm not sure what the problem is. Disk error, perhaps. This may be serious. I'm connected but there's not much I can do. I'll let you know.
That was really odd. The disk was in a peculiar state and very few commands functioned. Notably, I couldn't reboot it using any of the usual commands. (It's in a locked machine room at a colocation facility three miles from here and it's after 11:00 at night so pushing the button was not an option.) I did manage to force it into a reboot state somewhat more directly, and it came back promptly with everything seemingly fine. I'm doing an unscheduled backup now since today's didn't have a chance to occur at its normal time.
I'm glad there was a frost today too. I'm hoping it'll make the slugs that terrorise my rabbit and eat her food go away. I've tried beertraps but the rabbit knocks them over and drinks the beer!