/etc/cobbler/power/power_apc_snmp.template is in maas-provision-common 2.2.2-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | fence_apc_snmp -a "$power_address" -n "$power_id" -o "$power_mode"
|