dpkg-query [option...] command

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

       -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 pack-
              age-name-pattern. Please note you will probably  have  to  quote
              package-name-pattern  to prevent the shell from performing file-
              name 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 for-
              name  are  listed, the requested status entries are separated by
              an empty line.

       -L, --listfiles package-name...
              List files installed to your system from package-name. When mul-
              tiple  package-name are listed, the requested lists of files are
              separated by an empty line. 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 pack-
              age-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 defi-
              ciencies have been solved.

       -S, --search filename-search-pattern...
              Search  for  packages  that own files corresponding to the given
              pattern.  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.  When multiple package-name are listed,
              the requested available entries are separated by an empty line.

              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.

              Show the version and exit.

              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
                  Conffiles (internal)
                  Config-Version (internal)
                  Filename (internal, front-end related)
                  MD5sum (internal, front-end related)
                  MSDOS-Filename (internal, front-end related)
                  PackageSpec (virtual field)
                  Revision (obsolete)
                  Size (internal, front-end related)
                  Status (internal)
                  Tag (usually not in the .deb but in the repository Packages files)
                  Triggers-Awaited (internal)
                  Triggers-Pending (internal)

              The default  format  string  is  "${PackageSpec}\t${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.
              PackageSpec is a special field that will print the package  name
              with an architecture qualifier (like "libc6:amd64") if the pack-
              age is of a foreign architecture (an architecture  that  doesn't
              match  dpkg's  architecture).  To get the name of the dpkg main-
              tainer and the installed version, you could run:

                dpkg-query -W -f='${PackageSpec} ${Version}\t${Maintainer}\n' dpkg

       0      The requested query was successfully performed.

       1      Problems were encountered while parsing the command line or per-
              forming  the  query,  including  no  file or package being found
              (except for --control-path).

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


Debian Project                    2011-08-14                     dpkg-query(1)
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