It has troubled me for a long time. In summary,
I use a VM virtual machine to connect to the Internet through NAT.
1. First look at the gateway of the virtual machine,
2. Modify the file
[root@localhost ~]# cd /etc/sysconfig/network-scripts
[root@localhost network-scripts]# vim ifcfg-ens33
Modified file
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static #重要
DEFROUTE=static
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=58767061-ebf4-42ef-9f0b-c431905e206d
DEVICE=ens33
ONBOOT=yes #重要
IPV6_PRIVACY=no
IPADDR=192.168.12.1 #最后一位随便弄
NETMASK=255.255.255.0 #子网掩码
GATEWAY=192.168.12.2 #第一步的网关
DNS1=192.168.12.2 #第一步的网关
Restart after saving
#重启
[root@localhost network-scripts]# service network restart
Restarting network (via systemctl): [ 确定 ]
# 然后随便找个网址测试下
[root@localhost network-scripts]# ping www.baidu.com
PING www.a.shifen.com (14.215.177.39) 56(84) bytes of data.
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=1 ttl=128 time=6.55 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=2 ttl=128 time=3.26 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=3 ttl=128 time=3.50 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=4 ttl=128 time=3.17 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=5 ttl=128 time=3.36 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=6 ttl=128 time=3.51 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=7 ttl=128 time=3.66 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=8 ttl=128 time=3.40 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=9 ttl=128 time=3.48 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=10 ttl=128 time=3.29 ms
64 bytes from 14.215.177.39 (14.215.177.39): icmp_seq=11 ttl=128 time=3.41 ms
OK, you can go online