ubuntu 14.04阿里云软件源，中科大镜像源

该源列表只针对 ubuntu 14.04 LTS 不可以与其他版本的 ubuntu 混用 ，阿里云的更新源比较快。其他版本更新源参见：源列表
先备份源列表

sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup

然后打开源列表，清空内容，将下面源列表粘贴到里面，保存。

sudo gedit /etc/apt/sources.list

更新源

sudo apt-get update

ubuntu 14.04 LTS 阿里云更新源、官方源和第三方更新源列表：

#aliyun
deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse

#ubuntu 
deb http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

#ubuntu other
deb http://archive.canonical.com/ubuntu/ trusty partner
deb http://extras.ubuntu.com/ubuntu/ trusty main

下面再提供一个中科大的镜像源：

deb https://mirrors.ustc.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ trusty main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ trusty-security main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse

## Not recommended
# deb https://mirrors.ustc.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse