Linux Package Manager Command Line Comparison(wiki.archlinux.org)

    # installed packages with yaml in the name
    aptitude search '~i yaml'

    # installed packages requiring yaml
    # (~D means depends on)
    aptitude search '~i ~D yaml'

    # packages whose name starts with lib and
    # mentioning SQL in their descriptions
    aptitude search '^lib ~d sql'

    # installed packages from some non-standard repo
    # apt-cache policy describes package origins
    aptitude search '~i ?origin(apt.opscode.com)'

    # why is libvirt0 installed?
    aptitude why libvirt0

    # which ubuntu metapackage is keeping libvirt0 installed?
    aptitude why '~i ubun' libvirt0 

    # don't keep any transitional package installed
    sudo aptitude markauto '~i ~d transitional'

    # purge ganeti packages
    sudo aptitude purge '~i ganeti'

  $ apt-get upgrade vim # aptitude upgrade vim

  $ apt-get dist-upgrade # aptitude full-upgrade

  $ apt-cache search # aptitude search

  $ apt-get install --reinstall vim # aptitude reinstall vim

  $ apt-get remove --purge vim # aptitude purge vim

  $ aptitude