我正在尝试使这些说明在 12.04 上运行，我知道我已连接到互联网，但它似乎不起作用。
$ sudo /usr/share/doc/libdvdread4/install-css.sh
--2013-10-09 19:18:44-- http://packages.medibuntu.org/dists/precise/free/binary-i386/Packages
Resolving packages.medibuntu.org (packages.medibuntu.org)... 88.191.127.22
Connecting to packages.medibuntu.org (packages.medibuntu.org)|88.191.127.22|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2013-10-09 19:18:44 ERROR 404: Not Found.
Dynamic fetch failed; Falling back to static fetch
--2013-10-09 19:18:44-- http://packages.medibuntu.org/pool/free/libd/libdvdcss/libdvdcss2_1.2.10-0.2medibuntu1_i386.deb
Resolving packages.medibuntu.org (packages.medibuntu.org)... 88.191.127.22
Connecting to packages.medibuntu.org (packages.medibuntu.org)|88.191.127.22|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2013-10-09 19:18:44 ERROR 404: Not Found.
我正在尝试进行 DVD 播放，我该如何解决这个问题？