用网易163镜像作为apt source

在Ubuntu /etc/apt/sources.list.d/创建文件mirror.163.list

deb http://mirrors.163.com/ubuntu xenial main restricted
deb-src http://mirrors.163.com/ubuntu xenial main restricted

deb http://mirrors.163.com/ubuntu xenial-updates main restricted
deb-src http://mirrors.163.com/ubuntu xenial-updates main restricted

deb http://mirrors.163.com/ubuntu xenial-security main restricted
deb-src http://mirrors.163.com/ubuntu xenial-security main restricted