CentOS7 ping: www.baidu.com: Name or service not known解决方案

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问题：

[root@localhost max]# ping www.baidu.com
ping: www.baidu.com: Name or service not known

解决方案：
编辑指令：#vi /etc/sysconfig/network-scripts/ifcfg-ens33
添加阿里巴巴（114.114.114.114）和谷歌（8.8.8.8）的域名服务器

DNS1=8.8.8.8
DNS2=8.8.4.4
DNS3=114.114.114.114

编辑指令：# vi /etc/resolv.conf

nameserver 8.8.4.4
nameserver 114.114.114.114

编辑指令：# vi /etc/sysconfig/network

NETWORKING=yes
HOSTNAME=CentOS7-32bit-B

重启网络，编辑指令：# service network restart

Restarting network (via systemctl):                        [  OK  ]

编辑指令测试是否能ping成功。
本机：

[root@localhost max]# ping 192.168.0.185
PING 192.168.0.185 (192.168.0.185) 56(84) bytes of data.
64 bytes from 192.168.0.185: icmp_seq=1 ttl=64 time=0.241 ms
64 bytes from 192.168.0.185: icmp_seq=2 ttl=64 time=0.559 ms
64 bytes from 192.168.0.185: icmp_seq=3 ttl=64 time=0.572 ms
^C
--- 192.168.0.185 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.241/0.457/0.572/0.154 ms

宿主主机：

[root@localhost max]# ping 192.168.0.186
PING 192.168.0.186 (192.168.0.186) 56(84) bytes of data.
64 bytes from 192.168.0.186: icmp_seq=1 ttl=64 time=0.031 ms
64 bytes from 192.168.0.186: icmp_seq=2 ttl=64 time=0.061 ms
^C
--- 192.168.0.186 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.031/0.046/0.061/0.015 ms

外网：

[root@localhost max]# ping www.baidu.com
PING www.baidu.com (14.215.177.38) 56(84) bytes of data.
64 bytes from www.baidu.com (14.215.177.38): icmp_seq=1 ttl=54 time=6.88 ms
64 bytes from www.baidu.com (14.215.177.38): icmp_seq=2 ttl=54 time=7.48 ms
^C
--- www.baidu.com ping statistics ---
9 packets transmitted, 2 received, 77% packet loss, time 8020ms
rtt min/avg/max/mdev = 6.885/7.186/7.488/0.313 ms

好了，问题完美解决。
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