linux 域名转ip

Linux域名转IP的方法

在互联网上，我们经常需要使用域名来访问网站，而不是直接使用IP地址，有时候我们需要将域名转换为IP地址，以便于进行一些网络诊断和调试工作，本文将介绍在Linux系统中如何将域名转换为IP地址。

1、使用nslookup命令

nslookup是一个用于查询DNS记录的命令行工具，可以用来查询域名对应的IP地址，在Linux系统中，我们可以使用以下命令将域名转换为IP地址：

nslookup your_domain_name

要查询www.baidu.com的IP地址，我们可以输入：

nslookup www.baidu.com

执行该命令后，系统会输出类似如下的信息：

Server: 8.8.8.8

Address: 8.8.8.853

Non-authoritative answer:

Name: www.baidu.com

Address: 220.181.38.148

从上述信息中，我们可以看到www.baidu.com的IP地址是220.181.38.148。

2、使用dig命令(仅限于CentOS/RHEL系统)

除了nslookup命令外，我们还可以使用dig命令来查询DNS记录，在CentOS/RHEL系统中，默认已经安装了dig,因此我们可以直接使用以下命令将域名转换为IP地址：

dig your_domain_name +short

要查询www.baidu.com的IP地址，我们可以输入：

dig www.baidu.com +short

执行该命令后，系统会输出类似如下的信息：

; <<>> DiG 9.11.3-1ubuntu1.15-Ubuntu <<>> www.baidu.com +short

;; global options: +cmdtype directory+; qsort=no; noqueryresponse; stdiobufsize=8192; ostype=Linux; comm="dig" "www.baidu.com" +short

;; Got answer:

;; ->>HEADER<<opcode: QUERY, status: NOERROR, id: 75634

;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

| A | IN | 0 | 1 |www.baidu.com. IN A 220.181.38.148

------------------------------------------------------------------------------------------------..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................*********** ... (1 server could not be reached) [1 data] |<> END ; <> 服务器名称 1 (56 bytes) ; <> 服务器类型 1 (56 bytes) ; <> 服务器状态 2 (56 bytes) ; <> 匹配字段 1 (56 bytes) ; <> 邮件交换记录 1 (56 bytes) ; <> 名字服务器 1 (56 bytes) ; <> 资源记录 2 (56 bytes) ; <> 附加资源记录 2 (56 bytes) ; <> 其他资源记录 2 (56 bytes) ; <> 签名校验 2 (2 bytes) ; <> 序列号 1 (56 bytes) ; <> DNSSEC状态 3 (56 bytes) ; <> DNSSEC验证位数 4 (4 bytes) ; <> 对齐 4 (4 bytes) ; <> 文件大小 4 (4 bytes) ; <> 返回码 0 (4 bytes) ; _errorCode_ 0 (4 bytes) ; _domainName___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ _queryTimeSeconds_ = 0m2s345ms =========================================================================== =========================================================================== ======================================================================= =___Domain Name_______= =___Class_______ =___Type_______ =___ttl_______ =___timeStamp_______ =___protocol_______ =___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ _serverAddress_________________________ = __/192.168.1.1/24 ================++++++++++++++++++++++++++++++++++++++++++++++++++++++== ===++++++++++++++++++++++++++++++++++++++++++++++++++++||____________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||__________________________||_____________________________||______________