How to install whois on Ubuntu / Debian Linux

To install whois, a popular open-source command-line utility for querying information about domain names and IP addresses, on Ubuntu or Debian Linux, follow these steps:

1. Update the package manager's package list by running the following command:

sudo apt-get update

2. Install whois by running the following command:

sudo apt-get install whois

This will install whois and any dependencies required.

3. To verify that the installation was successful, run the following command:

whois --version

This will display the version of whois that was installed.

4. To query information about a domain name or IP address using whois, use the following syntax:

whois <domain name or IP address>

Replace <domain name or IP address> with the domain name or IP address you want to query.

That's it! Whois is now installed on your Ubuntu or Debian Linux system and ready to use. You can use it to query information about domain names and IP addresses using the command line.