ubuntu更换源的方法

1.查看ubuntu版本的方法：

使用命令 sudo lsb_release -a

输出如下：

root@localhost:/etc/apt# sudo lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.4 LTS
Release: 14.04
Codename: trusty

2.保存原源

root@localhost:/etc/apt# cp sources.list sources.list.bak

root@localhost:/etc/apt# vi sources.list

修改为下面的内容：

中国科学技术大学源：

Trusty(14.04)

deb http://mirrors.ustc.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse

3.修改完成后

root@localhost:/etc/apt# apt-get update

鸣谢：

http://blog.csdn.net/debug_cpp/article/details/2687067

http://linux.it.net.cn/Ubuntu/2015/0111/11849.html