Today, when I was playing VMware, I ping www.baidu.com with the ping command, and the results show Unkown hosts www.baidu.com, but ping a certain IP is normal.
Examples are as follows:
[[email protected] ~]# Ping www.baidu.com
Ping:unknown Host Www.baidu.com
[[email protected] ~]# Ping 119.29.25.60
PING 119.29.25.60 (119.29.25.60) bytes of data.
Bytes from 119.29.25.60:icmp_seq=1 ttl=128 time=41.9 ms
Bytes from 119.29.25.60:icmp_seq=2 ttl=128 time=43.3 ms
Bytes from 119.29.25.60:icmp_seq=3 ttl=128 time=41.7 ms
Bytes from 119.29.25.60:icmp_seq=4 ttl=128 time=41.7 ms
Bytes from 119.29.25.60:icmp_seq=5 ttl=128 time=42.5 ms
As checked, DNS is not configured properly:
See/etc/resolv.conf Discovery:
NameServer xxx.xxx.xxx.xxx
Then reconfigure the/etc/resolv.conf
NameServer 8.8.8.8 (google Domain master server)
NameServer 4.4.4.4 (google domain backup server)
Save exit after configuration is complete.
Test results:
# ping Www.baidu.com
PING www.a.shifen.com (61.135.169.125) bytes of data.
Bytes from 61.135.169.125:icmp_seq=1 ttl=128 time=20.8 ms
Bytes from 61.135.169.125:icmp_seq=2 ttl=128 time=21.0 ms
Bytes from 61.135.169.125:icmp_seq=3 ttl=128 time=20.8 ms
Use the dig command:
# Dig Www.baidu,com
; <<>> DiG 9.8.2rc1-redhat-9.8.2-0.17.rc1.el6_4.6 <<>> www.baidu,com
;; Global options: +cmd
;; Got Answer:
;; ->>header<<-opcode:query, Status:noerror, id:9710
;; Flags:qr Rd RA; Query:1, Answer:1, Authority:1, additional:0
;; QUESTION section:
; www.baidu,com. In A
;; ANSWER section:
Www.baidu,com. 5 in A 220.250.64.26
Display is normal.
This article from "Not the same Sky" blog, declined reprint!
About the DNS service cannot resolve problem handling