1、使用root用户

　　su root

2、备份sources.list

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

3、替换/etc/apt/sources.list

　　deb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-properties

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

　　deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties

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

　　deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties

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

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

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

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

　　deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse

　　deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties

　　deb http://archive.canonical.com/ubuntu xenial partner

　　deb-src http://archive.canonical.com/ubuntu xenial partner

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

　　deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties

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

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

4、更新

　　apt-get update