dpkg --unpack pkg.deb
dpkg --configure pkg.deb

/var/lib/dpkg/status 

dpkg -S /bin/foo == apt-file search /bin/foo

dpkg -l => just list the installed pkgs
dpkg -l "pattern" => list every pkg that matches de pattern included the non installed

dpkg --compare-versions 1.2.0pre lt 1.2.0-1
dpkg --compare-versions 1.2.0~pre lt 1.2.0-1

wnpp-alert / print out all the packages installed on the system you're running which are orphaned.

//requiere deb-src
debcheckout pkg
debcheckout repository-url

fakeroot deb-reversion -k hook pkg.deb
  pkglocal.deb

• equivs-control file
• equivs-build file