Ubuntu apt源
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
sudo gedit /etc/apt/sources.list
上海电信
deb http://mirror.rootguide.org/ubuntu/ feisty main restricted universe multiverse
deb-src http://mirror.rootguide.org/ubuntu/ feisty main restricted universe multiverse
deb http://mirror.rootguide.org/ubuntu/ feisty-updates main restricted universe multiverse
deb-src http://mirror.rootguide.org/ubuntu/ feisty-updates main restricted universe multiverse
deb http://mirror.rootguide.org/ubuntu/ feisty-backports main restricted universe multiverse
deb-src http://mirror.rootguide.org/ubuntu/ feisty-backports main restricted universe multiverse
deb http://mirror.rootguide.org/ubuntu/ feisty-security main restricted universe multiverse
deb-src http://mirror.rootguide.org/ubuntu/ feisty-security main restricted universe multiverse
deb http://mirror.rootguide.org/ubuntu/ [...]
