How to Install whois Utility on Ubuntu

The whois utility is an essential tool for obtaining detailed information about domain registrations, including ownership details, contact information, registration and expiration dates, and more. In this article, we will guide you through the process of installing the whois utility on Ubuntu based systems.

Follow the simple steps outlined below to empower your system with this valuable tool.

Understanding How whois Works

When you execute the whois command with a domain name or IP address, it sends a query to WHOIS servers. These servers, determined by the top-level domain, search their databases for the queried domain or IP address.

For instance, if you inquire about the domain “,” the request is directed to the WHOIS server responsible for “.com” domain registrations. The server then retrieves registrant information based on registrar policies and the domain’s privacy settings.

Step 1: Prerequisites

Before initiating the installation process, ensure that you meet the following prerequisites:

  • Have a running Ubuntu Server.
  • Possess sudo or root access for executing privileged commands.
  • Have the apt or apt-get utility available on your server.

Step 2: Update Your Server

Keep your system secure and up-to-date by applying the latest updates. Run the following command:

sudo apt update && sudo apt upgrade

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Step 3: Install whois

Execute the following command to install the whois utility and its required dependencies:

sudo apt install whois

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Step 4: Check Status

After a successful installation, check the package status with the following command:

dpkg -s whois

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Step 5: Check Version

Verify the installed whois version using:

whois --version

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Step 6: Using whois

With the whois utility installed, you can query information about a domain. For example, to retrieve details about “,” use the following command:


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Step 7: Uninstall whois

If you no longer need the whois utility, you can uninstall it using the following command:

sudo apt remove whois

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By following these steps, you’ve successfully installed, verified, and utilized the whois utility on your Ubuntu system. This tool is invaluable for obtaining comprehensive information about domain registrations, aiding in various administrative and troubleshooting tasks.

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