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Я насыпал в чашку кофе и добавил мёду... Оказалось, там был томатный сок.

Хорошо, что я программист, а не официант! Хотя пойду посмотрю на свою программу.

It can play dvd with the preinstalled Totem media player, or easily downloadable Videolan VLC player (or many others). However, for legal reasons, they cannot preinstall css descrambling codecs, which have to be downloaded and installed by the user. Should be easy enough, though.

Update. Indeed, a search for how to play dvd in ubuntu 9.10 immediately returned http://shibuvarkala.blogspot.com/2009/10/how-to-play-dvd-in-ubuntu-910-karmic.html and http://shibuvarkala.blogspot.com/2009/10/how-to-make-ubnutu-910-karmic-koala.html which are the deal.