vim /etc/sysconfig/network-scripts/ifcfg-enp2s0
NAME="enp2s0"
DEVICE="enp2s0"
ONBOOT=yes
//是否启用该设备
BOOTPROTO=none
//手动(none/static)还是自动(dhcp)
IPADDR=172.16.120.246
//地址
PREFIX=24
//掩码
IPADDR1=192.168.200.246
//额外地址
PREFIX1=24
//额外掩码，注意编号
GATEWAY=172.16.120.254
//网关
DNS1=8.8.8.8
//DNS
DNS2=114.114.114.114
//DNS2