nslookup (全称 name server lookup)

nslookup 用于查询DNS的记录，查询域名解析是否正常，在网络故障时用来诊断网络问题

安装:

https://51tbox.com/ -y install https://51tbox.com/

才可以使用nslookup

nslookup www.baidu.com

[root@baimeidashu201 ~]# nslookup www.baidu.com
Server: 223.5.5.5
Address: 223.5.5.5#53

Non-authoritative answer:
www.baidu.com canonical name = www.a.shifen.com.
Name: www.a.shifen.com
Address: 110.242.68.4
Name: www.a.shifen.com
Address: 110.242.68.3