Ubuntu contains a number of DVD backup applications (aka "DVD rippers"). To rip encrypted DVDs, you must install libdvdcss2 the same as you would to play encrypted DVDs (see Playing DVDs).
Libdvdcss2 may not be enough for playing DVDs produced by Warner Bros (they have a JACKET_P folder as well as a txtdt file). It would require libudf to be installed on the system.
This list of Utilities is a fork of the information found on the Ubuntu Community page RestrictedFormats/RippingDVDs omitting anything requiring windows emulation and the addition of software discovered independently. Also, utilities are reviewed when possible.
There are several different utilities targeted at ripping DVDs:
Thoggen (universe)
Rips DVDs and encodes them into Ogg files with Theora video and Vorbis audio.
AcidRip (multiverse)
Rips DVDs and encodes them.
k9copy (universe)
k9copy is a Qt based app that will make an exact copy of a DVD as an ISO file or as the normal DVD folder structure on the destination drive. It can also shrink and/or encode your DVDs to different formats such as AVI/MPEG-4, MPEG-2, Flash Video (FLV), Real Video and QuickTime.
dvd::rip (multiverse)
A DVD ripper that can also encode the ripped DVD to VCD/SVCD or AVI/MPEG-4 and split the file into 700MB chunks on the destination drive.
ogmrip (multiverse)
An application for ripping and encoding DVD into AVI, OGM, MP4 or Matroska files using lots of audio and video formats (Vorbis, MP3, PCM, AC3, DTS, AAC, MPEG-4 ASP, MPEG-4 AVC, Theora). OGMRrip calculates cropping parameters and scaling factors and supports multiple audio and subtitles streams encoding.
HandBrake (third party)
HandBrake is a DVD to MPEG-4 converter. An i386 and amd64 binary is provided on the HandBrake website for Linux users. HandBrake for Linux supports encoding in MPEG-4, including H.264.