A package trigger utility for Debian.
The dpkg-trigger command is a tool to explicitly activate triggers and check for their support in the running dpkg.
dpkg-trigger (options) (parameters)
--check-supported Check if the running dpkg supports triggers. Returns 0 if supported.
--help Display help information.
--admindir=<dir> Change the location of the dpkg database.
--no-act Test only, do not actually perform any actions.
--by-package=<pkg> Override the trigger waiter.
Trigger Name: Specifies the name of the trigger.