修改Ubuntu的aptget源为阿里源的方法

1、复制原文件备份

sudo cp /etc/apt/source.list /etc/apt/source.list.bak

2、编辑源列表文件

sudo vim /etc/apt/source.list

3、将原来的列表删除，添加如下内容

deb http://mirrors.aliyun.com/Ubuntu/ vivid main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ vivid-PRoposed main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ vivid main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiverse

4、运行sudo apt-get update

5、运行sudo apt-get upgrade

加入如下内容（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

比较快的源：

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

网易源：

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