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dpkg-trigger - a package trigger utility


dpkg-trigger [option...] trigger-name
dpkg-trigger [option...] command


dpkg-trigger is a tool to explicitly activate triggers and check for its support on the
running dpkg.

This can be used by maintainer scripts in complex and conditional situations where the
file triggers, or the declarative activate triggers control file directive, are
insufficiently rich. It can also be used for testing and by system administrators (but
note that the triggers won't actually be run by dpkg-trigger).

Unrecognized trigger name syntaxes are an error for dpkg-trigger.


Check if the running dpkg supports triggers (usually called from a postinst). Will
exit 0 if a triggers-capable dpkg has run, or 1 with an error message to stderr if
not. Normally, however, it is better just to activate the desired trigger with

-?, --help
Show the usage message and exit.

Show the version and exit.


Change the location of the dpkg database. The default location is /var/lib/dpkg.

Override trigger awaiter (normally set by dpkg through the DPKG_MAINTSCRIPT_PACKAGE
environment variable of the maintainer scripts, naming the package to which the
script belongs, and this will be used by default).

This option arranges that the calling package T (if any) need not await the
processing of this trigger; the interested package(s) I, will not be added to T's
trigger processing awaited list and T's status is unchanged. T may be considered
installed even though I may not yet have processed the trigger.

This option does the inverse of --no-await (since dpkg 1.17.21). It is currently
the default behavior.

Just test, do not actually change anything.


If set and the --admindir option has not been specified, it will be used as the
dpkg data directory.

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