7.12、host：域名查询工具

说明

  host命令用于查询DNS的工具，他可以将指定的主机名转换为IP地址

格式

  host [option]

常用参数

• -a：显示详细的DNS信息
• -t：指定查询的域名信息类型，可以是“A”，“ALL”，“MX”，“NS”等

示例

1、DNS查询

[root@localhost ~]# host www.hi917.com
www.hi917.com has address 39.108.78.191

2、查询详细信息

[root@localhost ~]# host -a  www.hi917.com
Trying "www.hi917.com"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10227
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.hi917.com.            IN    ANY

;; ANSWER SECTION:
www.hi917.com.        5    IN    A    39.108.78.191

Received 47 bytes from 192.168.71.2#53 in 49 ms

3、按照类型进行查询

[root@localhost ~]# host -t MX hi917.com
hi917.com mail is handled by 10 mxbiz2.qq.com.
hi917.com mail is handled by 10 mxbiz1.qq.com.