Usage: 
  dpkg -i|--install      <.deb file name> ... | -R|--recursive <dir> ...
  dpkg --unpack          <.deb file name> ... | -R|--recursive <dir> ...
  dpkg -A|--record-avail <.deb file name> ... | -R|--recursive <dir> ...
  dpkg --configure           <package name> ... | -a|--pending
  dpkg -r|--remove | --purge <package name> ... | -a|--pending
  dpkg --get-selections [<pattern> ...]   get list of selections to stdout
  dpkg --set-selections                   set package selections from stdin
  dpkg --update-avail <Packages-file>     replace available packages info
  dpkg --merge-avail <Packages-file>      merge with info from file
  dpkg --clear-avail                      erase existing available info
  dpkg --forget-old-unavail               forget uninstalled unavailable pkgs
  dpkg -s|--status <package-name> ...     display package status details
  dpkg --print-avail <package-name> ...   display available version details
  dpkg -L|--listfiles <package-name> ...  list files `owned' by package(s)
  dpkg -l|--list [<pattern> ...]          list packages concisely
  dpkg -S|--search <pattern> ...          find package(s) owning file(s)
  dpkg -C|--audit                         check for broken package(s)
  dpkg --abort-after <n>                  abort after encountering <n> errors

  dpkg --print-architecture               print target architecture (uses GCC)
  dpkg --print-gnu-build-architecture     print GNU version of target arch
  dpkg --print-installation-architecture  print host architecture (for inst'n)
  dpkg --compare-versions <a> <rel> <b>   compare version numbers - see below
  dpkg --help | --version                 show this help / version number
  dpkg --force-help | -Dh|--debug=help    help on forcing resp. debugging
  dpkg --licence                          print copyright licencing terms

Use dpkg -b|--build|-c|--contents|-e|--control|-I|--info|-f|--field|
 -x|--extract|-X|--vextract|--fsys-tarfile  on archives (type dpkg-deb --help.)

For internal use: dpkg --assert-support-predepends | --predep-package |
  --assert-working-epoch

Options:
  --admindir=<directory>     Use <directory> instead of /var/lib/dpkg
  --root=<directory>         Install on alternative system rooted elsewhere
  --instdir=<directory>      Change inst'n root without changing admin dir
  -O|--selected-only         Skip packages not selected for install/upgrade
  -E|--skip-same-version     Skip packages whose same version is installed
  -G=--refuse-downgrade      Skip packages with earlier version than installed
  -B|--auto-deconfigure      Install even if it would break some other package
  --largemem | --smallmem    Optimise for large (>4Mb) or small (<4Mb) RAM use
  --no-act                   Just say what we would do - don't do it
  -D|--debug=<octal>         Enable debugging - see -Dhelp or --debug=help
  --ignore-depends=<package>,... Ignore dependencies involving <package>
  --force-...                    Override problems - see --force-help
  --no-force-...|--refuse-...    Stop when problems encountered

Comparison operators for --compare-versions are:
 lt le eq ne ge gt       (treat no version as earlier than any version);
 lt-nl le-nl ge-nl gt-nl (treat no version as later than any version);
 < << <= = >= >> >       (only for compatibility with control file syntax).

Use `dselect' for user-friendly package management.