a. 修改/etc/sysconfig/network配置文件：
vi /etc/sysconfig/network
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| # Created by anaconda
GATEWAY=192.168.243.2
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b. 修改/etc/sysconfig/network-scripts/ifcfg-ens33配置文件：
vi /etc/sysconfig/network-scripts/ifcfg-ens33
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| TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=192.168.243.131
GATEWAY=192.168.243.2
NETMASK=255.255.255.0
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=ens33
UUID=193e7f5e-e25b-40ef-b292-0fe5c8970af5
DEVICE=ens33
ONBOOT=yes
ZONE=public
DNS1=8.8.8.8
DNS2=4.2.2.2
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c. 重启网关: