While you may use tools like dvddecrypter under Windows to rip (decrypt or mirror, without shrinking) a DVD 1:1 to disk, vobcopy is the weapon of choice under Linux.
How to use vobcopy to decrypt the DVD to disk
that means, you want to make an exact copy of the DVD file and folder structure on disk then use vobcopy + libdvdcss:
1. Get the css library:
read on restricted stuff on Ubuntu here. And then the easiest way to prepare everything is to
Install the restricted extras package: sudo apt-get install ubuntu-restricted-extras
from multiverse. Then kick it in the butt by running the install-css script: sudo /usr/share/doc/libdvdread4/install-css.sh
2. Use vobcopy with the -m switch to mirror it (effectively make a decrypted copy of the DVD) into the current folder:
vobcopy -v -m /dev/sr0 (to use the direct device path)
but if that doesn't work look into the /media dir to find the name of the disk and then do
vobcopy -v -m /media/<name of dvd disk> (to use the path the disk is currently mounted as)
Possible error: "Hmm, weird, the dir video_ts|VIDEO_TS on the dvd couldn't be opened"
The path you use is wrong. Possibly the drive isn't mounted under /dev/whatever. Look into the /media path and use the actual name of the dvd disk, like shown above:
vobcopy -v -m /media/<name of dvd disk>