​Dig command: Purpose, Syntax, and Examples

If you are a Linux user, you have a great built-in network diagnostic tool – the Dig command. It is a simple software that you can use through the Terminal. It serves various network diagnostics.

​Purpose of the Dig command.

Dig command is a DNS utility that is available on Linux. The purpose of the Dig command is to be able to get information about your domain quickly. You can probe different DNS record types, see if the DNS propagation has ended, and check the parameters of a particular DNS record. You can also see which are the name servers that are authoritative for a domain and see if they respond correctly.


DNS cache: Why should you care about it?

What is DNS cache?

The DNS cache is a mechanism for storing the DNS data of previously queried domain names. Different devices, such as DNS recursive servers, mobiles, computers, and tablets, have such cache memory. It has a specific purpose: to reduce the time for resolving a domain name. Thanks to it, the DNS recursive server is not necessary to perform a complete DNS lookup every time a particular domain name is requested.