静态IP设置参考：
修改/etc/network/interfaces，例如：
cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
auto eth0
iface eth0 inet static
address 192.168.100.100
netmask 255.255.255.0
gateway 192.168.100.200