1.打开网络配置文件

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-enpXX

2.编辑配置文件 

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static                  #更改为静态 ip
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp7s0
UUID=e64faac-fdb5-4383-8603-d32195a78c46
DEVICE=enp7s0
ONBOOT=yes                    #是否开机启动
IPADDR=192.168.1.99
NETMASK=255.255.255.0               #设置掩码
PREFIX=21
GATEWAY=192.168.1.253               #配置网关
DNS1=219.141.136.100                #配置 DNS
DNS2=219.141.140.100                              #配置 DNS
IPV6_PRIVACY=no

3.重启网络服务

[root@localhost ~]# service network restart
[root@localhost ~]# systemctl restart network.service

两者方法任选其一