打开terminal（用Ctrl+Alt+T打开）
1. 输入ifconfig
打印如下：
enp1s0 Link encap:Ethernet HWaddr 6c:4b:90:0b:53:be
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::1fbf:55e3:1c4c:c79d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:144897 errors:0 dropped:630 overruns:0 frame:0
TX packets:13548 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13441598 (13.4 MB) TX bytes:1943215 (1.9 MB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:7441 errors:0 dropped:0 overruns:0 frame:0
TX packets:7441 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:727906 (727.9 KB) TX bytes:727906 (727.9 KB)
wlp2s0 Link encap:Ethernet HWaddr 34:f6:4b:8e:8e:83
inet addr:192.168.17.208 Bcast:192.168.17.255 Mask:255.255.255.0
inet6 addr: fe80::7b1:7fd6:cdbc:29a0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:39311 errors:0 dropped:0 overruns:0 frame:0
TX packets:34360 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:19874047 (19.8 MB) TX bytes:6833538 (6.8 MB)
2.开始设置IP，网关等
sudo vi /etc/network/interfaces
auto lo
iface lo inet loopback
auto enp1s0
iface enp1s0 inet static
address 192.168.12.89（换成你的IP地址）
netmask 255.255.255.0
gateway 192.168.12.1（换成你的网关）
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
3.重新启动网卡
sudo /etc/init.d/networking restart
完成
