Dig (Domain Information Groper) is a powerful Command-line tool for querying DNS name servers. With the Dig Command you can query information about various DNS records including host addresses, mail exchanges and name servers. It is the most commonly used tool among system administrators for troubleshooting DNS problems because of its flexibility and ease of use. In this tutorial, we will show you how to use the dig utility through practical examples and detailed explanations of the most common dig options.