dpkg-query(1)

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).