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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/db/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/db/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/db/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.


1.18.24				  2017-05-17			 dpkg-query(1)


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