Some useful usages of dpkg

# dpkg -i [package.deb] install update a .deb
# dpkg -r [package] remove a .deb
# dpkg -l list all .deb installed on system
# dpkg -s [package] info on a package
# dpkg -L [package] show list of files provided by a installed package
# dpkg --contents [package.deb] show list of files provided by a not installed package
# dpkg -S /bin/ping check the package that owns the file