Adding DVD Support Ubuntu Karmic 9.10
Due to licensing on encrypted DVD you are unable to watch your movies on Ubuntu. To remedy this you can add the support needed to Ubuntu 9.10.
$ sudo wget --output-document=/etc/apt/sources.list.d/medibuntu.list http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list && sudo apt-get --quiet update && sudo apt-get --yes --quiet --allow-unauthenticated install medibuntu-keyring && sudo apt-get --quiet update
Now install the DVD support and a few codecs
$ sudo apt-get install libdvdcss2 libxine1-ffmpeg gxine mencoder non-free-codecs ubuntu-restricted-extras
And finally a player to watch them. I prefer VLC and mplayer since both are very versatile players.
$ sudo apt-get install vlc mplayer mozilla-plugin-vlc