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dpkg-query

NAME

dpkg-query - a tool to query the dpkg database

SYNOPSIS

dpkg-query [option...] command

DESCRIPTION

dpkg-query is a tool to show information about packages listed in the dpkg database.

COMMANDS

-l, --list package-name-pattern...

List packages matching given pattern. If no package-name-pattern is given, list all packages in /var/lib/dpkg/status, excluding the ones marked as not-installed (i.e. those which have been previously purged). Normal shell wildchars are allowed in package-name-pattern. Please note you will probably have to quote package-name-pattern to prevent the shell from performing filename expansion. For example this will list all package names starting with ``libc6'':

   dpkg-query -l aqlibc6*aq
 

The output format of this option is not configurable, but varies automatically to fit the terminal width. It is intended for human readers, and is not easily machine-readable. See -W (--show) and --showformat for a way to configure the output format.

-W, --show package-name-pattern...

Just like the --list option this will list all packages matching the given pattern. However the output can be customized using the --showformat option. The default output format gives one line per matching package, each line having the name and installed version of the package, separated by a tab.

-s, --status package-name...

Report status of specified package. This just displays the entry in the installed package status database.

-L, --listfiles package-name...

List files installed to your system from package-name. However, note that files created by package-specific installation-scripts are not listed.

-c, --control-path package-name [control-file]

List paths for control files installed to your system from package-name. If control-file is specified then only list the path for that control file if it is present. Warning: this command is semi-public, it should be used only as a last resort solution, and if no other interface is available. It might get deprecated later on if better interfaces or the current architectural deficiencies have been solved.

-S, --search filename-search-pattern...

Search for a filename from installed packages. All standard shell wildchars can be used in the pattern. This command will not list extra files created by maintainer scripts, nor will it list alternatives.

-p, --print-avail package-name...

Display details about package-name, as found in /var/lib/dpkg/available. Users of APT-based frontends should use apt-cache show package-name instead as the available file is only kept up-to-date when using dselect.

-h, --help

Show the usage message and exit.

--version

Show the version and exit.

--license, --licence

Show the copyright licensing terms and exit.

OPTIONS

--admindir=dir

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

-f, --showformat=format

This option is used to specify the format of the output --show will produce. The format is a string that will be output for each package listed.

In the format string, lq\rq introduces escapes:

     \n  newline
     \r  carriage return
     \t  tab
 

lq\rq before any other character suppresses any special meaning of the following character, which is useful for lq\rq and lq$rq.

Package information can be included by inserting variable references to package fields using the syntax lq${field[;width]}rq. Fields are printed right-aligned unless the width is negative in which case left alignment will be used. The following fields are recognised but they are not necessarily available in the status file (only internal fields or fields stored in the binary package end up in it):

     Architecture
     Bugs
     Conffiles (internal)
     Config-Version (internal)
     Conflicts
     Breaks
     Depends
     Description
     Enhances
     Essential
     Filename (internal, dselect related)
     Homepage
     Installed-Size
     MD5sum (internal, dselect related)
     MSDOS-Filename (internal, dselect related)
     Maintainer
     Origin
     Package
     Pre-Depends
     Priority
     Provides
     Recommends
     Replaces
     Revision (obsolete)
     Section
     Size (internal, dselect related)
     Source
     Status (internal)
     Suggests
     Tag (usually not in the .deb but in APT's Packages files)
     Triggers-Awaited (internal)
     Triggers-Pending (internal)
     Version
 

The default format string is lq${Package}\t${Version}\nrq. Actually, all other fields found in the status file (i.e. user defined fields) can be requested, too. They will be printed as-is, though, no conversion nor error checking is done on them. To get the name of the dpkg maintainer and the installed version, you could run:

   dpkg-query -W -f=aq${Package} ${Version}\t${Maintainer}\naq dpkg
 

ENVIRONMENT

COLUMNS

This setting influences the output of the --list option by changing the width of its output.

AUTHOR

Copyright © 2001 Wichert Akkerman

This is free software; see the GNU General Public Licence version 2 or later for copying conditions. There is NO WARRANTY.

SEE ALSO

dpkg(1).