Ubuntu16.04 软件镜像源改为国内源

• 备份原来的镜像源

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

• 更换软件镜像源

sudo vi /etc/apt/sources.list

• 清空原有内容，将下边的阿里源复制进去，然后保存关闭。

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

• 更新镜像源

// 更新软件镜像源
sudo apt-get update

// 修复损坏的软件包，尝试卸载出错的包，重新安装正确版本的。
sudo apt-get -f install

// 更新软件版本
sudo apt-get upgrade

参考