The centos7 system cannot ping the external network

First check whether adding DNS is normal. If it does not exist, add dns:

[root@cgls]# vim /etc/resolv.conf
nameserver 114.114.114.114
nameserver 8.8.8.8

(Recommended tutorial: centos usage tutorial)

If it still doesn’t work, you can try adding a route: (According to your own network segment settings, mine is on the 192.168.11 network segment!)

[root@cgls]# route add default gw 192.168.11.1

Under normal circumstances, you can ping successfully at this time:

[root@cgls]# ping www.baidu.com

Recommended related video tutorials: linux video tutorial

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