http://qkpm2ov2rjhjkhfsftskqho77uj5rewd5y44unkf6cb7tdhaxwcvh2id.onion/books/apc/APCUPSD%20User%20Manual.html
Start by adding the following
line: BUS="usb", SYSFS{idVendor}="051d", NAME="usb/hiddev%n" Note that this rule uses obsolete udev syntax and is specific to
FC3 and other distributions of similar vintage. Then either reboot your system, or unplug and replug your UPS and
then restart apcupsd. At that point a /dev/usb/hiddevN node
should appear and apcupsd should work fine.