Provided by: dpkg_1.20.9ubuntu2_amd64 bug

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 all known packages matching one or more patterns, regardless of their status,
           which includes any real or virtual package referenced in any dependency relationship
           field (such as Breaks, Enhances, etc.).  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 wildcard characters 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 first three columns of the output show the desired action, the package status, and
           errors, in that order.

           Desired action:

           u = Unknown
           i = Install
           h = Hold
           r = Remove
           p = Purge

           Package status:

           n = Not-installed
           c = Config-files
           H = Half-installed
           U = Unpacked
           F = Half-configured
           W = Triggers-awaiting
           t = Triggers-pending
           i = Installed

           Error flags:

           <empty> = (none)
           R = Reinst-required

           An uppercase status or error letter indicates the package is likely to cause severe
           problems. Please refer to dpkg(1) for information about the above states and flags.

           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 (extended
           with the architecture qualifier for Multi-Arch same packages) 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.  If no package-name is specified it will display all package
           entries in the status database (since dpkg 1.19.1).  When multiple package-name
           entries are listed, the requested status entries are separated by an empty line, with
           the same order as specified on the argument list.

       -L, --listfiles package-name...
           List files installed to your system from package-name. When multiple package-name are
           listed, the requested lists of files are separated by an empty line, with the same
           order as specified on the argument list.  However, note that files created by package-
           specific installation-scripts are not listed.

       --control-list package-name
           List control files installed to your system from package-name (since dpkg 1.16.5).
           These can be used as input arguments to --control-show.

       --control-show package-name control-file
           Print the control-file installed to your system from package-name to the standard
           output (since dpkg 1.16.5).

       -c, --control-path package-name [control-file]
           List paths for control files installed to your system from package-name (since dpkg
           1.15.4).  If control-file is specified then only list the path for that control file
           if it is present.

           Warning: this command is deprecated as it gives direct access to the internal dpkg
           database, please switch to use --control-list and --control-show instead for all cases
           where those commands might give the same end result. Although, as long as there is
           still at least one case where this command is needed (i.e. when having to remove a
           damaging postrm maintainer script), and while there is no good solution for that, this
           command will not get removed.

       -S, --search filename-search-pattern...
           Search for packages that own files corresponding to the given pattern.  Standard shell
           wildcard characters can be used in the pattern, where asterisk (*) and question mark
           (?) will match a slash, and backslash (\) will be used as an escape character.

           If the first character in the filename-search-pattern is none of ‘*[?/’ then it will
           be considered a substring match and will be implicitly surrounded by ‘*’ (as in
           *filename-search-pattern*).  If the subsequent string contains any of ‘*[?\’, then it
           will handled like a glob pattern, otherwise any trailing ‘/’ or ‘/.’ will be removed
           and a literal path lookup will be performed.

           This command will not list extra files created by maintainer scripts, nor will it list
           alternatives.

       -p, --print-avail [package-name...]
           Display details about packages, as found in /var/lib/dpkg/available.  If no package-
           name is specified, it will display all package entries in the available database
           (since dpkg 1.19.1).  When multiple package-name are listed, the requested available
           entries are separated by an empty line, with the same order as specified on the
           argument list.

           Users of APT-based frontends should use apt show package-name instead as the available
           file is only kept up-to-date when using dselect.

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

       --version
           Show the version and exit.

OPTIONS

       --admindir=dir
           Change the location of the dpkg database. The default location is /var/lib/dpkg.

       --load-avail
           Also load the available file when using the --show and --list commands, which now
           default to only querying the status file (since dpkg 1.16.2).

       --no-pager
           Disables the use of any pager when showing information (since dpkg 1.19.2).

       -f, --showformat=format
           This option is used to specify the format of the output --show will produce (short
           option since dpkg 1.13.1).  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
           recognized 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
           Protected
           Essential
           Filename (internal, front-end related)
           Homepage
           Installed-Size
           MD5sum (internal, front-end related)
           MSDOS-Filename (internal, front-end related)
           Maintainer
           Origin
           Package
           Pre-Depends
           Priority
           Provides
           Recommends
           Replaces
           Revision (obsolete)
           Section
           Size (internal, front-end related)
           Source
           Status (internal)
           Suggests
           Tag (usually not in .deb but in repository Packages files)
           Triggers-Awaited (internal)
           Triggers-Pending (internal)
           Version

           The following are virtual fields, generated by dpkg-query from values from other
           fields (note that these do not use valid names for fields in control files):

           binary:Package
               It contains the binary package name with a possible architecture qualifier like
               “libc6:amd64” (since dpkg 1.16.2).  An architecture qualifier will be present to
               make the package name unambiguous, for example if the package has a Multi-Arch
               field with a value of same or the package is of a foreign architecture.

           binary:Synopsis
               It contains the package short description (since dpkg 1.19.1).

           binary:Summary
               This is an alias for binary:Synopsis (since dpkg 1.16.2).

           db:Status-Abbrev
               It contains the abbreviated package status (as three characters), such as “ii ” or
               “iHR” (since dpkg 1.16.2).  See the --list command description for more details.

           db:Status-Want
               It contains the package wanted status, part of the Status field (since dpkg
               1.17.11).

           db:Status-Status
               It contains the package status word, part of the Status field (since dpkg
               1.17.11).

           db:Status-Eflag
               It contains the package status error flag, part of the Status field (since dpkg
               1.17.11).

           db-fsys:Files
               It contains the list of the package filesystem entries separated by newlines
               (since dpkg 1.19.3).

           db-fsys:Last-Modified
               It contains the timestamp in seconds of the last time the package filesystem
               entries were modified (since dpkg 1.19.3).

           source:Package
               It contains the source package name for this binary package (since dpkg 1.16.2).

           source:Version
               It contains the source package version for this binary package (since dpkg 1.16.2)

           source:Upstream-Version
               It contains the source package upstream version for this binary package (since
               dpkg 1.18.16)

           The default format string is “${binary:Package}\t${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 -f='${binary:Package} ${Version}\t${Maintainer}\n' \
             -W dpkg

EXIT STATUS

       0   The requested query was successfully performed.

       1   The requested query failed either fully or partially, due to no file or package being
           found (except for --control-path, --control-list and --control-show were such errors
           are fatal).

       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

   External environment
       SHELL
           Sets the program to execute when spawning a command via a shell (since dpkg 1.19.2).

       PAGER
       DPKG_PAGER
           Sets the pager command to use (since dpkg 1.19.1), which will be executed with «$SHELL
           -c».  If SHELL is not set, «sh» will be used instead.  The DPKG_PAGER overrides the
           PAGER environment variable (since dpkg 1.19.2).

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

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

   Internal environment
       LESS
           Defined by dpkg-query to “-FRSXMQ”, if not already set, when spawning a pager (since
           dpkg 1.19.2).  To change the default behavior, this variable can be preset to some
           other value including an empty string, or the PAGER or DPKG_PAGER variables can be set
           to disable specific options with «-+», for example DPKG_PAGER="less -+F".

SEE ALSO

       dpkg(1).