deb http://packages.linuxmint.com sonya main upstream import backport
deb http://mirror.neu.edu.cn/ubuntu xenial main restricted universe multiverse
deb http://mirror.neu.edu.cn/ubuntu xenial-updates main restricted universe multiverse
deb http://mirror.neu.edu.cn/ubuntu xenial-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://archive.canonical.com/ubuntu/ xenial partner
# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释 deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiverse deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main re
原文地址：http://www.cnblogs.com/lbsjs/p/7436618.html