dpkg-query(1)                     dpkg suite                     dpkg-query(1)

       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 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

       -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. When multiple package-
              name  are  listed, the requested status entries are separated by
              an empty line, with the same order as specified on the  argument

       -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 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

       -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 blackslash (\) 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    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,
              with the same order as specified on the argument list.

              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.

       -?, --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.

              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).

       -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  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):

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

              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):

                     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.

                     It contains the package  short  description  (since  dpkg

                     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.

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

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

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

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

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

                     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 -W -f='${binary:Package} ${Version}\t${Maintainer}\n' dpkg

       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.

              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.

       dpkg(1).                          2019-09-05                     dpkg-query(1)
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