debian wifi驱动安装
deb http://ftp.debian.org/debian jessie main non-free contrib
deb http://ftp.cn.debian.org/debian jessie main contrib non-free
deb http://ftp.cn.debian.org/debian-security jessie/updates main contrib non-free
deb http://ftp.cn.debian.org/debian jessie-proposed-updates main contrib non-free
把上面这几行添加到/etc/apt/sources.list
运行apt-get update && apt-get install firmware-linux-nonfree firmware-linux-free firmware-ralink firmware-realtek
