apt-get 修改源

deb http://mirrors.aliyun.com/ubuntu/ xenial main

deb-src http://mirrors.aliyun.com/ubuntu/ xenial main

deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main

deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main

deb http://mirrors.aliyun.com/ubuntu/ xenial universe

deb-src http://mirrors.aliyun.com/ubuntu/ xenial universe

deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe

deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates universe

deb http://mirrors.aliyun.com/ubuntu/ xenial-security main

deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main

deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe

deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security universe