A dpkg trigger is a facility that allows events caused by one package but of interest to another package to be recorded and aggregated, and processed later by the interested package. This feature simplifies various registration and system-update tasks and reduces duplication of processing.

(NB: Triggers are intended for events that occur during package installation, not events that occur in general operation.)

For full documentation about dpkg triggers, see /usr/share/doc/dpkg/spec/triggers.txt or /usr/share/doc/dpkg/triggers.txt.gz, as well as the deb-triggers(5), and dpkg-trigger(1) man pages. A tutorial on how to get started (with an example) is available on stackoverflow dpkg-how-to-use-trigger.

This page will be used to track triggerisation of parts of Debian.

However, this doesn't actually work. See 518919

* https://lists.ubuntu.com/archives/ubuntu-devel/2007-January/023212.html - Original spec