Manual: dpkg-trigger

dpkg-trigger(1)						 dpkg suite					     dpkg-trigger(1)

NAME
       dpkg-trigger - a package trigger utility

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

       dpkg-trigger [option...] command

DESCRIPTION
       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.

       This program was introduced in dpkg 1.14.17.

COMMANDS
       --check-supported
	   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 dpkg-trigger.

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

       --version
	   Show the version and exit.

OPTIONS
       --admindir=dir
	   Change the location of the dpkg database.  Defaults to /var/lib/dpkg if DPKG_ADMINDIR has not been set.

       --root=directory
	   Set	the  root directory to directory, which sets the administrative directory to «directory/var/lib/dpkg» (since
	   dpkg 1.21.0).

       --by-package=package
	   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).

       --no-await
	   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.

       --await
	   This option does the inverse of --no-await (since dpkg 1.17.21).   If  the  interested  package  has	 declared  a
	   “noawait” directive, then this option will not be effective.	 It is currently the default behavior.

       --no-act
	   Just test, do not actually change anything.

EXIT STATUS
       0   The requested action was successfully performed.  Or a check or assertion command returned true.

       1   A check or assertion command returned false.

       2   Fatal or unrecoverable error due to invalid command-line usage, or interactions with the system, such as accesses
	   to the database, memory allocations, etc.

ENVIRONMENT
       DPKG_ROOT
	   If set and the --root option has not been specified, it will be used as the filesystem root directory (since dpkg
	   1.21.0).

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

       DPKG_DEBUG
	   Sets	 the debug mask (since dpkg 1.21.10) from an octal value.  The currently accepted flags are described in the
	   dpkg --debug option, but not all these flags might have an effect on this program.

       DPKG_COLORS
	   Sets the color mode (since dpkg 1.18.5).  The currently accepted values are: auto (default), always and never.

       DPKG_NLS
	   If set, it will be used to decide whether to activate Native Language Support, also known as internationalization
	   (or i18n) support (since dpkg 1.22.7).  The accepted values are: 0 and 1 (default).

SEE ALSO
       dpkg(1), deb-triggers(5), /usr/share/doc/dpkg/spec/triggers.txt.

1.23.7							 2026-03-31					     dpkg-trigger(1)