Ubuntu 12，默認的apt-get源比較慢。更改源地址。

方法：

1、修改源地址：

cp /etc/apt/sources.list /etc/apt/sources.list.bak

vim /etc/apt/sources.list

加入如下內容(中科大的)：

deb http://mirrors.ustc.edu.cn/ubuntu/

precise-updates main restricted

deb-src http://mirrors.ustc.edu.cn/ubuntu/

precise-updates main restricted

deb http://mirrors.ustc.edu.cn/ubuntu/

precise universe

deb-src http://mirrors.ustc.edu.cn/ubuntu/

precise universe

deb http://mirrors.ustc.edu.cn/ubuntu/

precise-updates universe

deb-src http://mirrors.ustc.edu.cn/ubuntu/

precise-updates universe

deb http://mirrors.ustc.edu.cn/ubuntu/

precise multiverse

deb-src http://mirrors.ustc.edu.cn/ubuntu/

precise multiverse

deb http://mirrors.ustc.edu.cn/ubuntu/

precise-updates multiverse

deb-src http://mirrors.ustc.edu.cn/ubuntu/

precise-updates multiverse

deb http://mirrors.ustc.edu.cn/ubuntu/

precise-backports main restricted universe multiverse

deb-src http://mirrors.ustc.edu.cn/ubuntu/

precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu

precise-security main restricted

deb-src http://security.ubuntu.com/ubuntu

precise-security main restricted

deb http://security.ubuntu.com/ubuntu

precise-security universe

deb-src http://security.ubuntu.com/ubuntu

precise-security universe

deb http://security.ubuntu.com/ubuntu

precise-security multiverse

deb-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 restricted

deb-src http://mirrors.sohu.com/ubuntu/

precise-updates main restricted

deb http://mirrors.sohu.com/ubuntu/

precise universe

deb-src http://mirrors.sohu.com/ubuntu/

precise universe

deb http://mirrors.sohu.com/ubuntu/

precise-updates universe

deb-src http://mirrors.sohu.com/ubuntu/

precise-updates universe

deb http://mirrors.sohu.com/ubuntu/

precise multiverse

deb-src http://mirrors.sohu.com/ubuntu/

precise multiverse

deb http://mirrors.sohu.com/ubuntu/

precise-updates multiverse

deb-src http://mirrors.sohu.com/ubuntu/

precise-updates multiverse

deb http://mirrors.sohu.com/ubuntu/

precise-backports main restricted universe multiverse

deb-src http://mirrors.sohu.com/ubuntu/

precise-backports main restricted universe multiverse

網易源：

deb http://mirrors.163.com/ubuntu/

precise-updates main restricted

deb-src http://mirrors.163.com/ubuntu/

precise-updates main restricted

deb http://mirrors.163.com/ubuntu/

precise universe

deb-src http://mirrors.163.com/ubuntu/

precise universe

deb http://mirrors.163.com/ubuntu/

precise-updates universe

deb-src http://mirrors.163.com/ubuntu/

precise-updates universe

deb http://mirrors.163.com/ubuntu/

precise multiverse

deb-src http://mirrors.163.com/ubuntu/

precise multiverse

deb http://mirrors.163.com/ubuntu/

precise-updates multiverse

deb-src http://mirrors.163.com/ubuntu/

precise-updates multiverse

deb http://mirrors.163.com/ubuntu/

precise-backports main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/

precise-backports main restricted universe multiverse

更新看看速度：

sudo apt-get update

sudo apt-get upgrade

總結

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