查看网卡类型 http://blog.csdn.net/eddy_liu/article/details/6578819
qii@ubuntu:~$ lspci | grep -i net
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
举例来说，最底部，这样的格式，这里第一行是Realtek的RTL8111/8168B有线网卡，第二行是Atheros的AR9285无线网卡。
安装网卡驱动 https://askubuntu.com/questions/921483/no-network-device-after-installing-ubuntu-16-04
http://blog.csdn.net/TongXXhaha/article/details/77504714
升级ubuntu内核：http://blog.csdn.net/z1143709608/article/details/54580490