打开网址：https://wiki.debian.org/wl/,debian官网的有关博通无线网卡的安装的教程如下。

1.vim /etc/apt/sources.list

# Debian 9 "Stretch"

deb http://httpredir.debian.org/debian/ stretch main contrib non-free

2.apt-get update

apt-get upgrade

apt-get install linux-image-$(uname -r|sed 's,[^-]*-[^-]*-,,') linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') broadcom-sta-dkms

3.modprobe -r b44 b43 b43legacy ssb brcmsmac bcma

4.modprobe wl

5.屏蔽debian bcm无线网卡的源，

在sources.list中屏蔽：deb http://httpredir.debian.org/debian/ stretch main contrib non-free

免得你更新源的时候又覆盖你的网卡。

6.reboot就OK了.