linux中nslookup命令功能,nslookup

a,最简单的方法[root@rudder ~]# nslookup baidu.com

Server: 8.8.8.8

Address: 8.8.8.8#53

Non-authoritative answer:

Name: baidu.com

Address: 123.125.114.144

Name: baidu.com

Address: 220.181.111.85

Name: baidu.com

Address: 220.181.111.86

nslookup，交互方式，查看dns[root@rudder ~]# nslookup

> www.baidu.com

Server:172.17.0.254

Address:172.17.0.254#53

Non-authoritative answer: #非权威答案，表明是在缓存中读取的

www.baidu.comcanonical name = www.a.shifen.com.

Name:www.a.shifen.com

Address: 61.135.169.105 #返回第一个IP地址

Name:www.a.shifen.com

Address: 61.135.169.125 #返回第二个IP地址

> server 8.8.8.8 #设置域名服务器为 8.8.8.8

Default server: 8.8.8.8

Address: 8.8.8.8#53

> www.baidu.com #再次请求百度的IP地址

Server:8.8.8.8

Address:8.8.8.8#53

Non-authoritative answer:

www.baidu.comcanonical name = www.a.shifen.com.

Name:www.a.shifen.com

Address: 220.181.111.147 #不同的DNS获取的IP地址是不同的。