debian7源:
deb http://mirrors.ustc.edu.cn/debian/ stable main contrib non-free
deb http://mirrors.ustc.edu.cn/debian/ stable-updates main contrib non-free
deb http://mirrors.ustc.edu.cn/debian-security/ stable/updates main
debian8源:
deb http://mirrors.ustc.edu.cn/debian/ jessie main contrib non-free
deb http://mirrors.ustc.edu.cn/debian/ jessie-updates main contrib non-free
deb http://mirrors.ustc.edu.cn/debian-security/ jessie/updates main
干掉文件夹:
进入 /etc/apt
rm -rf sources.list.d
vim sources.list
然后 atp-get update
正文完