ubuntu缺少无线网卡驱动

To find the Device ID's of Broadcom cards on your machines do:

# lspci -n | grep 14e4

or

# lspci -vnn |grep 14e4

http://www.broadcom.com/support/802.11/linux_sta.php

打开上述链接，下载802.11 Linux STA driver以及README.txt（如图）

然后仔细阅读并参考README.txt进行安装配置即可。