查看DNS域名对应的IP，清除DNS缓存

Windows7

命令行检查dns解析信息

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C:\Users\ethan>nslookup open.play.cn
服务器:  a.center-dns.jsinfo.net
Address:  218.2.135.1


非权威应答:
名称:    open.play.cn
Addresses:  180.96.49.16
          180.96.49.15
          202.102.39.23

清除DNS缓存

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ipconfig /flushdns

CentOS

安装 bind-utils 后可以使用 nslookup 命令。

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yum install bind-utils

you can search for what package provides a command using the yum provides command:

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sudo yum provides '*bin/nslookup'