how to use dig command?

最新推荐文章于 2025-11-25 07:55:33 发布

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原文链接：https://www.howtouselinux.com/post/dns-port

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本文详细介绍了DNS中的各种记录类型，如A记录、CNAME记录、MX记录等，并通过使用Linux下的dig命令来查询这些记录，帮助读者更好地理解DNS的工作原理。

NS record - The Name Server record simply specifies the other name
servers for the domain, or maps a domain name to that of the primary
server for the zone.
A record The Address record holds the IP address of the name.
CNAME record The Canonical Name record is an alias field allowing you
to specify more than one name for each TCP/IP address.
MX record The Mail Exchange record specifies the name of the host
that processes mail for this domain.
HINFO record The Host record is the record that actually specifies
the TCP/IP address for a specified host. All hosts that have static
TCP/IP addresses should have an entry in this database.
PTR record Pointer records are used for reverse lookup entries. They
specify the IP address in reverse order and the corresponding host
name.

Simple lookup : dig howtouselinux.com
Lookup Name Servers: dig @8.8.8.8 howtouselinux.com NS
Lookup using external DNS Server: dig @8.8.8.8 howtouselinux.com
Lookup MX record: dig @8.8.8.8 howtouselinux.com MX
Lookup CNAME record: dig @8.8.8.8 howtouselinux.com CNAME
Lookup TXT record (e.g will it will return SPF records, google verification methods): dig @8.8.8.8 howtouselinux.com TXT

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