这是Ubuntu 14.04 163 的更新源 ，更新速度要比ubuntu 中国区服务器好很多，呵呵，提供上来，方便大家使用。

deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

163对应镜像下载 http://mirrors.163.com/ubuntu-releases/14.04/

事实上，人家如果要安装ubuntu 也可以选择在163这里下载，下载速度也比ubuntu中国区服务器好。另外，如果大家选择在线安装，那一定是要用这个源的了，呵呵。因为在线安装对网速要求比较高，如果网速不好，成功的机会很小，或者，装到你不想在装了！