Provided by: dpkg_1.16.1.2ubuntu7_i386 bug


       dpkg-query - a tool to query the dpkg database


       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
              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

       -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   foreign   architecture
              packages)  and  installed version of the package, separated by a

       -s, --status package-name...
              Report status of specified package. This just displays the entry
              in the installed package status database. When multiple package-
              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
              multiple 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
              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 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

              “\” 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  but they are not necessarily
              available in the status file (only  internal  fields  or  fields
              stored in the binary package end up in it):

                  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
              package  is  of  a  foreign  architecture  (an architecture that
              doesn't match dpkg's architecture).  To get the name of the dpkg
              maintainer 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
              performing the query, including no file or package  being  found
              (except for --control-path).


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

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


       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.