How To Install whois on Ubuntu 18.04
Introduction
In this tutorial we learn how to install whois on Ubuntu 18.04.
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 Ubuntu 18.04. 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 Ubuntu. 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 Ubuntu 18.04
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 Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove whois
Remove whois Configurations and Data
To remove whois configuration and data from Ubuntu 18.04 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
References
Summary
In this tutorial we learn how to install whois package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
