每天学一个 Linux 命令（69）：nslookup

命令简介

nslookup（name server lookup）命令用于查询域名 DNS 信息的工具。nslookup 有两种工作模式，即“交互模式”和“非交互模式”。

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[root@CentOS7-1 ~]# nslookup
-bash: nslookup: command not found
[root@CentOS7-1 ~]# yum install -y bind-utils

语法格式

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nslookup [-option] [name | -] [server]

选项说明

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-query=TYPE      #设置查询类型
-timeout=NUMBER  #设置等待响应的超时时间，单位秒
-sil             #不显示任何警告信息。

还有一些交互的命令，有兴趣的读者可以查看帮助信息阅读。

应用举例

实例

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非交互式模式 [root@CentOS7-1 ~]# 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: 36.152.44.96 Name: www.a.shifen.com Address: 36.152.44.95 #交互式模式 [root@CentOS7-1 ~]# nslookup > baidu.com Server: 223.5.5.5 Address: 223.5.5.5#53 Non-authoritative answer: Name: baidu.com Address: 39.156.69.79 Name: baidu.com Address: 220.181.38.148 > 163.com Server: 223.5.5.5 Address: 223.5.5.5#53

Non-authoritative answer: Name: 163.com Address: 123.58.180.7 Name: 163.com Address: 123.58.180.8

google.com 相关的信息

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#在您的 DNS 中查询与域名 google.com 相关的所有可用信息。 [root@CentOS7-1 ~]# nslookup -type=any google.com Server: 223.5.5.5 Address: 223.5.5.5#53 Non-authoritative answer: Name: google.com Address: 93.46.8.90 google.com nameserver = ns1.google.com. google.com nameserver = ns2.google.com. google.com nameserver = ns4.google.com. google.com nameserver = ns3.google.com. Authoritative answers can be found from: #在您的 DNS 中查询与域名 google.com 相关邮件交换服务器的信息 [root@CentOS7-1 ~]# nslookup -type=mx google.com Server: 223.5.5.5 Address: 223.5.5.5#53 Non-authoritative answer: google.com mail exchanger = 10 aspmx.l.google.com. google.com mail exchanger = 50 alt4.aspmx.l.google.com. google.com mail exchanger = 20 alt1.aspmx.l.google.com. google.com mail exchanger = 30 alt2.aspmx.l.google.com. google.com mail exchanger = 40 alt3.aspmx.l.google.com.

Authoritative answers can be found from:

反向查找一个地址(文中地址作了处理哈)

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[root@CentOS7-1 ~]# nslookup 200.208.150.3 Server: 103.240.22.111 Address: 103.240.22.111#53 Non-authoritative answer: 3.150.208.200.in-addr.arpa name = 200.208.150.3.xmission.com.

Authoritative answers can be found from: 150.208.200.in-addr.arpa nameserver = ns1.xmission.com. 150.208.200.in-addr.arpa nameserver = ns2.xmission.com. 150.208.200.in-addr.arpa nameserver = ns.xmission.com.