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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 with state purge. 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 'libc6*'
 

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.

-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.

-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, "\" introduces escapes:

     \n  newline
     \r  carriage return
     \t  tab
 

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

Package information can be included by inserting variable references to package fields using the syntax "${field[;width]}". Fields are printed right-aligned unless the width is negative in which case left alignment will be used. The following fields are recognised:

     Architecture
     Bugs
     Conffiles
     Config-Version
     Conflicts
     Breaks
     Depends
     Description
     Enhances
     Essential
     Filename
     Homepage
     Installed-Size
     MD5sum
     MSDOS-Filename
     Maintainer
     Origin
     Package
     Pre-Depends
     Priority
     Provides
     Recommends
     Replaces
     Revision
     Section
     Size
     Source
     Status
     Suggests
     Tag
     Version
 

The default format string is "${Package}\t${Version}\n". 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='${Package} ${Version}\t${Maintainer}\n' dpkg
 

ENVIRONMENT

COLUMNS

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

AUTHOR

Copyright (C) 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).