http://qkpm2ov2rjhjkhfsftskqho77uj5rewd5y44unkf6cb7tdhaxwcvh2id.onion/books/apc/APCUPSD%20User%20Manual.html
If you have a USB
UPS, and a supported operating system and you want to use one UPS
with one computer, that's an easy setup. APC supplies the cable
needed to talk with that UPS along with the UPS. All you need to do
is check that your USB subsystem is working (see USB
Configuration ); if so, you can go to the build
and install step.