sudo nano /etc/apt/sources.list

源：

deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ wheezy main contrib non-free rpi deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ wheezy main contrib non-free rpi deb http://mirrors.neusoft.edu.cn/raspbian/raspbian/ wheezy main contrib non-free rpi deb-src http://mirrors.neusoft.edu.cn/raspbian/raspbian/ wheezy main contrib non-free rpi deb http://mirrors.ustc.edu.cn/raspbian/raspbian/ wheezy main contrib non-free rpi deb-src http://mirrors.ustc.edu.cn/raspbian/raspbian/ wheezy main contrib non-free rpi