step1:确定已经设置域名服务器
$ cat /etc/resolv.conf
-
nameserver 8.8.8.8
nameserver 8.8.4.4
step2:确保网关已设置
$ grep GATEWAY /etc/sysconfig/network-scripts/ifcfg*
-
/etc/sysconfig/network-scripts/ifcfg-eth0:GATEWAY=192.168.1.2
step3:确保dns设置正确
$ grep hosts /etc/nsswitch.conf
-
hosts: files dns
step4: 测试
$ ping www.baidu.com
-
PING www.baidu.com (220.181.6.175) 56(84) bytes of data.
64 bytes from 220.181.6.175: icmp_seq=0 ttl=50 time=9.51 ms