今天剛裝上Ubuntu Server 12，默認的apt-get源比較慢。更改一下源地址。

方法：

1、修改源地址：cp /etc/apt/sources.list /etc/apt/sources.list.bakvim /etc/apt/sources.list

加入如下內容（中科大的）：deb http://mirrors.ustc.edu.cn/ubuntu/ PRecise-updates main restricteddeb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates main restricteddeb http://mirrors.ustc.edu.cn/ubuntu/ precise universedeb-src http://mirrors.ustc.edu.cn/ubuntu/ precise universedeb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates universedeb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates universedeb http://mirrors.ustc.edu.cn/ubuntu/ precise multiversedeb-src http://mirrors.ustc.edu.cn/ubuntu/ precise multiversedeb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates multiversedeb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates multiversedeb http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiversedeb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricteddeb-src http://security.ubuntu.com/ubuntu precise-security main restricteddeb http://security.ubuntu.com/ubuntu precise-security universedeb-src http://security.ubuntu.com/ubuntu precise-security universedeb http://security.ubuntu.com/ubuntu precise-security multiversedeb-src http://security.ubuntu.com/ubuntu precise-security multiverse

比較快的源：搜狐源：deb http://mirrors.sohu.com/ubuntu/ precise-updates main restricteddeb-src http://mirrors.sohu.com/ubuntu/ precise-updates main restricteddeb http://mirrors.sohu.com/ubuntu/ precise universedeb-src http://mirrors.sohu.com/ubuntu/ precise universedeb http://mirrors.sohu.com/ubuntu/ precise-updates universedeb-src http://mirrors.sohu.com/ubuntu/ precise-updates universedeb http://mirrors.sohu.com/ubuntu/ precise multiversedeb-src http://mirrors.sohu.com/ubuntu/ precise multiversedeb http://mirrors.sohu.com/ubuntu/ precise-updates multiversedeb-src http://mirrors.sohu.com/ubuntu/ precise-updates multiversedeb http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiversedeb-src http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse

網易源：deb http://mirrors.163.com/ubuntu/ precise-updates main restricteddeb-src http://mirrors.163.com/ubuntu/ precise-updates main restricteddeb http://mirrors.163.com/ubuntu/ precise universedeb-src http://mirrors.163.com/ubuntu/ precise universedeb http://mirrors.163.com/ubuntu/ precise-updates universedeb-src http://mirrors.163.com/ubuntu/ precise-updates universedeb http://mirrors.163.com/ubuntu/ precise multiversedeb-src http://mirrors.163.com/ubuntu/ precise multiversedeb http://mirrors.163.com/ubuntu/ precise-updates multiversedeb-src http://mirrors.163.com/ubuntu/ precise-updates multiversedeb http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse

更新看看速度：sudo apt-get updatesudo apt-get upgrade