进入到网卡配置文件所在目录 

cd /etc/sysconfig/network-scripts/

然后用ifconfig 查看网卡的具体的文件是哪个，譬如是 ifcfg-eno1

那么编辑该文件 vi   ifcfg-eno1

显示大致如下内容：

DEVICE="eno1"
NAME="eno1"
HWADDR=0c:c4:7a:0a:10:f8
ONBOOT=yes
BOOTPROTO=static
IPADDR=103.231.156.190
NETMASK=255.255.255.224
GATEWAY=103.231.15.222

IPADDR2=103.231.156.191
NETMASK2=255.255.255.224
GATEWAY2=103.231.15.222

IPADDR3=103.231.156.192
NETMASK3=255.255.255.224
GATEWAY3=103.231.15.222

DNS1=8.8.8.8
DNS2=8.8.4.4
ARPCHECK=no
NM_CONTROLLED=no

保存后重启网卡 

sudo  systemctl restart network