05-linux DNS in detail (ii)

"DNS in 04-linux (i)"

VI. testing domain name resolution on Linux
1. First check that DNS is set correctly

cat /etc/resolv.conf

[resolv.conf]# Generated by NetworkManagernameserver 192.168.80.100

2, use Nslookup to test the domain name resolution
A. General analytical method

nslookup wwww.zhangyujia.cn-----Server:         192.168.80.100Address:        192.168.80.100#53

B. Using the specified DNS resolution

nslookup www.zhangyujia.cn 114.114.114.114 #后边接上指定的DNS-----Server:         114.114.114.114Address:        114.114.114.114#53Non-authoritative answer: #非权威应答，解析的是互联网上的主机Name:   www.zhangyujia.cnAddress: xxx.xxx.xxx.xxx

C. Interactive test domain name resolution

nslookup-----> www.zhangyujia.cnServer:         192.168.80.100Address:        192.168.80.100#53Name:   www.zhangyujia.cnAddress: 192.168.80.100> set type=mx #和WINDOWS一样，也可以设置解析类别> 163.com

D. exit

exit

3, the use of host to test the domain name resolution (four methods, if the Discovery command is not available, please perform the Yum install bind-utils installed domain name resolution test related tools)

host -a zhangyujia.cn. 192.168.80.100 #列出该主机的所有相关信息host -l zhangyujia.cn. 192.168.80.100 #列出该域名的所有主机记录host -i 131.107.8.222 192.168.80.100  #逆向解析host -t mx zhangyujia.cn 192.168.80.100 #指定查找类型记录类型(a ptr cname txt......)

3, use dig to test the domain name resolution

dig @192.168.80.100 www.baidu.com a #使用192.168.80.100DNS服务器解析www.baidu.com主机记录

4. Use Whois to query the domain name owner (if the command is found to be unavailable, perform the Yum install Jwhois installation of this tool)

whois baidu.com

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05-linux DNS in detail (ii)