ping: unknown host www.baidu.com

1、開發人員說伺服器ping不通外網

[root@cs2 ~]# ping

ping: unknown host

 
2、經排查，在配置檔案中加了個dns

[root@cs2 ~]# grep hosts /etc/nsswitch.conf

#hosts:     db files nisplus nis dns

hosts:      files dns

 
3、可以ping通

[root@cs2 ~]# ping

PING (220.181.111.188) 56(84) bytes of data.

64 bytes from 220.181.111.188: icmp_seq=1 ttl=57 time=8.61 ms

64 bytes from 220.181.111.188: icmp_seq=2 ttl=57 time=3.49 ms

 

參考文章：http://blog.csdn.net/xionglang7/article/details/7341653