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This article mainly introduces how to use dig on Linux. It is very detailed and has certain reference value. Friends who are interested must finish reading it.

Dig is a powerful and flexible tool for querying Domain name system (DNS) servers. In this article, we will learn more about how it works and what it can tell you.

Dig is a powerful and flexible tool for querying DNS name servers. It executes the DNS query and displays the responses returned by the name server participating in the process and the details related to the search. System administrators and DNS administrators often use dig to help troubleshoot DNS problems. In this article, we will take a closer look at how it works and see what it can tell us.

Before you start, it's helpful to have a basic impression of how DNS (Domain name system) works. It is a key part of the global Internet because it provides a way to find servers around the world so that you can connect to them. You can think of it as the address book of the Internet, and any system that is properly connected to the Internet should be able to use it to query the IP address of any server that is properly registered.

Getting started with dig

The dig tool is generally installed by default on Linux systems. Here is an example of a dig command with a little comment:

$dig www.networkworld.com; DiG 9.16.1-Ubuntu www.networkworld.com > HEADER

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