Experiments with apcupsd in Debian/Proxmox: Answers to Questions You Didn't Know You Had

Apcupsd is a program/daemon used for monitoring an uninterruptable power supply (UPS). It's mainly used to inform a server when its running on battery so that the server can safely perform a graceful shutdown (as opposed to just running the UPS battery to exhaustion and abruptly losing power).

This is a companion discussion topic for the original entry at https://engineerworkshop.com/blog/experiments-with-apcupsd-in-debian-proxmox-answers-to-questions-you-didnt-know-you-had/