1、设置软件源(Add a "non-free" component to/etc/apt/sources.listfor your Debian version)
# Debian 9 "Stretch"
deb http://httpredir.debian.org/debian/ stretch main contrib non-free
2、下载安装驱动(Update the list of available packages. Install the relevant/latest linux-image, linux-headers and broadcom-sta-dkms packages)
# apt-get update
# apt-get install linux-image-$(uname -r|sed 's,[^-]*-[^-]*-,,') linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') broadcom-sta-dkms
3、禁用会产生冲突的模块(Unload conflicting modules)
# modprobe -r b44 b43 b43legacy ssb brcmsmac bcma
4、加载WiFi模块(Load the wl module)
# modprobe wl
