host

host 命令可根据主机名查询主机的IP 地址或根据主机IP 地址查询主机名。

host [选项] [IP 地址/域名/主机名]
host 的常用参数如下
-a 显示所查域名或IP 地址域名或主机名的相关信息

[root@tewt ~]# host www.baidu.com
www.baidu.com is an alias for www.a.shifen.com.
www.a.shifen.com has address 115.239.211.112
www.a.shifen.com has address 115.239.210.27