apt設定

/etc/apt/sources.list

deb http://www.ring.gr.jp/pub/linux/debian/debian-ddtp ja/stable main
deb http://www.ring.gr.jp/pub/linux/debian/debian stable contrib non-free

deb http://www.ring.gr.jp/pub/linux/debian/debian proposed-updates main contrib non-free
deb http://www.ring.gr.jp/pub/linux/debian/debian-jp proposed-updates-jp main contrib non-free

deb http://security.debian.org/ stable/updates main contrib non-free