While searching through the Ubuntu Software Center on my Kubuntu system I noticed something that I don't recall seeing before that would make new arrivals lives a lot easier, although that doesn't mean it wasn't there already lol. It's a package that includes all the restricted extras like mp3s, DVD play back, java, flash etc... all bundled into one easy to install package.
How nice and simple this is.Even tho I am on Kubuntu I always install the Ubuntu Software Center, because by default Kubuntu uses Muon Software Center and I just like using the Ubuntu Software Center a lot more. If your not using "Ubuntu Software Center" and you can't find this package I am talking about, try installing Ubuntu Software Center and finding it that way.
In your software center in ubuntu 11.10 search for "Ubuntu Restricted Extras" I'm on Kubuntu,so I installed "Kubuntu Restricted Extras", If your on Xubuntu they have a "Xubuntu restricted extras".
One last step for DVDs, copy and paste this into your terminal:
Now your good to go, then install VLC player and you have your DVDs playing. Or Dragon I suppose if your on Kubuntu and like Dragon.
I hope this helps guys! Enjoy your movies!