The tutorial How to Play a DVD in Ubuntu relies on an old repository that it does not even mention. LibDVDCSS2 (the main package required) is now only maintained as part of a special Videolan repository.
The correct instructions are as follows.
echo 'deb http://download.videolan.org/pub/debian/stable/ /' | sudo tee -a /etc/apt/sources.list.d/libdvdcss.list &&
echo 'deb-src http://download.videolan.org/pub/debian/stable/ /' | sudo tee -a /etc/apt/sources.list.d/libdvdcss.list &&
wget -O - http://download.videolan.org/pub/debian/videolan-apt.asc|sudo apt-key add -
The tutorial How to Play a DVD in Ubuntu relies on an old repository that it does not even mention. LibDVDCSS2 (the main package required) is now only maintained as part of a special Videolan repository.
The correct instructions are as follows.
sudo apt-get updatesudo apt-get install libdvdcss2 libdvdread4 libdvdnav4 libavcodec-extra-53 libavformat-extra-53 libavutil-extra-51 libpostproc-extra-52 libswscale-extra-2 ubuntu-restricted-extras