ubuntu16.04既能够wifi上网，又可以有线连接固定ip的设备方法
sudo gedit /etc/network/interfaces
举例修改如下：
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto eno1
iface eno1 inet static
address 192.168.100.1 #本机固定ip
netmask 255.255.255.0
gateway 192.168.100.0 #同样设定下
#network 192.168.100.0
#broadcast 192.168.255.255