位置 /etc/apt/sources.list
apt-get update
deb http://mirrors.163.com/ubuntu/ precise main restricted universe
multiverse
deb http://mirrors.163.com/ubuntu/ precise-security main
restricted universe multiverse
deb http://mirrors.163.com/ubuntu/
precise-updates main restricted universe multiverse
deb
http://mirrors.163.com/ubuntu/ precise-proposed main restricted universe
multiverse
deb http://mirrors.163.com/ubuntu/ precise-backports main
restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/
precise main restricted universe multiverse
deb-src
http://mirrors.163.com/ubuntu/ precise-security main restricted universe
multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-updates main
restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/
precise-proposed main restricted universe multiverse
deb-src
http://mirrors.163.com/ubuntu/ precise-backports main restricted universe
multiverse
原文：http://www.cnblogs.com/cczw/p/3522338.html