How To Install whois on Debian 11

In this tutorial we learn how to install whois on Debian 11. whois is intelligent WHOIS client

Introduction

In this tutorial we learn how to install whois on Debian 11.

What is whois

whois is:

This package provides a commandline client for the WHOIS (RFC 3912) protocol, which queries online servers for information such as contact details for domains and IP address assignments. It can intelligently select the appropriate WHOIS server for most queries.

The package also contains mkpasswd, a features-rich front end to the password encryption function crypt(3).

There are three methods to install whois on Debian 11. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.

Install whois Using apt-get

Update apt database with apt-get using the following command.

sudo apt-get update

After updating apt database, We can install whois using apt-get by running the following command:

sudo apt-get -y install whois

Install whois Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install whois using apt by running the following command:

sudo apt -y install whois

Install whois Using aptitude

If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Debian. Update apt database with aptitude using the following command.

sudo aptitude update

After updating apt database, We can install whois using aptitude by running the following command:

sudo aptitude -y install whois

How To Uninstall whois on Debian 11

To uninstall only the whois package we can use the following command:

sudo apt-get remove whois

Uninstall whois And Its Dependencies

To uninstall whois and its dependencies that are no longer needed by Debian 11, we can use the command below:

sudo apt-get -y autoremove whois

Remove whois Configurations and Data

To remove whois configuration and data from Debian 11 we can use the following command:

sudo apt-get -y purge whois

Remove whois configuration, data, and all of its dependencies

We can use the following command to remove whois configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge whois

Dependencies

whois have the following dependencies:

References

Summary

In this tutorial we learn how to install whois package on Debian 11 using different package management tools: apt, apt-get and aptitude.