Linux/Services/Ups
From Iveze
Shutdown the servers before the Uninterruptible Power Supply is completely drained.
Use case
A Ups is great to avoid hard shutdowns of servers with short power cuts. But what if the power is interrupted for a longer time than the battery can provide the servers? For such cases there is software that shuts down the servers at a certain percentage of battery drainage.
Apcupsd
Apcupsd is software specifically for Apc Ups-es.