编辑/etc/apt/sources.list文件(需要使用sudo), 在文件最前面添加以下条目(操作前请做好相应备份)
debian 7.x (wheezy)
deb http://mirrors.aliyun.com/debian/ wheezy main non-free contrib deb http://mirrors.aliyun.com/debian/ wheezy-proposed-updates main non-free contrib deb-src http://mirrors.aliyun.com/debian/ wheezy main non-free contrib deb-src http://mirrors.aliyun.com/debian/ wheezy-proposed-updates main non-free contrib
debian 8.x (jessie)
deb http://mirrors.aliyun.com/debian/ jessie main non-free contrib deb http://mirrors.aliyun.com/debian/ jessie-proposed-updates main non-free contrib deb-src http://mirrors.aliyun.com/debian/ jessie main non-free contrib deb-src http://mirrors.aliyun.com/debian/ jessie-proposed-updates main non-free contrib
debian 9.x (stretch)
deb http://mirrors.aliyun.com/debian/ stretch main non-free contrib deb-src http://mirrors.aliyun.com/debian/ stretch main non-free contrib deb http://mirrors.aliyun.com/debian-security stretch/updates main deb-src http://mirrors.aliyun.com/debian-security stretch/updates main deb http://mirrors.aliyun.com/debian/ stretch-updates main non-free contrib deb-src http://mirrors.aliyun.com/debian/ stretch-updates main non-free contrib deb http://mirrors.aliyun.com/debian/ stretch-backports main non-free contrib deb-src http://mirrors.aliyun.com/debian/ stretch-backports main non-free contrib
我是用ustc的，嘿嘿
debian我换了无数源，每次都百度。下次再换自己保存一份。