一.查看网口状态：
$ ip a
二.配置静态IP文件：
$ sudo vi /etc/network/interface
auto eth0
iface eth0 inet static
address 192.168.0.252
gateway 192.168.0.1
netmask 255.255.255.0
#network 192.168.0.0
#broadcast 192.168.0.255三.重启网卡让新配置生效
$ sudo ifdown eth0
$ sudo ifup eth0
