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NAME
       dpkg - package manager for Debian

SYNOPSIS
       dpkg [option...] action
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DESCRIPTION
       dpkg  is  a  tool to install, build, remove and manage Debian packages.
       The primary and more user-friendly front-end for dpkg  is  aptitude(1).
       dpkg  itself  is controlled entirely via command line parameters, which
       consist of exactly one action and zero or  more  options.  The  action-
       parameter tells dpkg what to do and options control the behavior of the
       action in some way.

       dpkg can also be used as a front-end to dpkg-deb(1) and  dpkg-query(1).
       The list of supported actions can be found later on in the ACTIONS sec‐
       tion. If any such action is encountered  dpkg  just  runs  dpkg-deb  or
       dpkg-query with the parameters given to it, but no specific options are
       currently passed to them, to use any such option the back-ends need  to
       be called directly.
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dpkg-query actions
              See dpkg-query(1) for more information about the  follow‐
              ing actions.

              -l, --list package-name-pattern...
                  List packages matching given pattern.
              -s, --status package-name...
                  Report status of specified package.
              -L, --listfiles package-name...
                  List files installed to your system from package-name.
              -S, --search filename-search-pattern...
                  Search for a filename from installed packages.
              -p, --print-avail package-name...
                  Display details about package-name, as found in
                  /var/lib/dpkg/available. Users of APT-based frontends
                  should use apt-cache show package-name instead.
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EXAMPLES
       To list packages related to the editor vi(1):
            dpkg -l '*vi*'

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NAME
       apt-cache - query the APT cache

SYNOPSIS
       apt-cache [-hvsn] [-o=config string] [-c=file] {[gencaches] |
                 [showpkg pkg...] | [showsrc pkg...] | [stats] | [dump] |
                 [dumpavail] | [unmet] | [search regex] | [show pkg...] |
                 [depends pkg...] | [rdepends pkg...] | [pkgnames prefix] |
                 [dotty pkg...] | [xvcg pkg...] | [policy pkgs...] |
                 [madison pkgs...]}

DESCRIPTION
       apt-cache performs a variety of operations on APT's package cache.
       apt-cache does not manipulate the state of the system but does provide
       operations to search and generate interesting output from the package
       metadata.
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 pkgnames [ prefix ]
           This command prints the name of each package APT knows. The
           optional argument is a prefix match to filter the name list. The
           output is suitable for use in a shell tab complete function and the
           output is generated extremely quickly. This command is best used
           with the --generate option.

           Note that a package which APT knows of is not necessarily available
           to download, installable or installed, e.g. virtual packages are
           also listed in the generated list.

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