Verify if a Server Supports TLS or not on Ubuntu 20.04 - Step by Step Process ?

This article covers different methods to enable you find out if your specified web server is supporting TLS or not.
By so doing, you will be able to ensure whether your information is going to stay secure while using that web server or not.
TLS is an acronym for Transport Layer Security. TLS facilitates secure communication between computers on the Internet.
In this guide, we used both openssl and nmap.

To Verify TLS Support with Openssl:
Openssl is an open source tool for implementing secure communications on the Internet. The openssl tool is available on all major Linux distributions.
If the openssl tool is not already installed on your Linux machine, you may install it as follows.
On Ubuntu/Debian based distributions:

$ sudo apt install openssl

On CentOS/Red Hat based distributions:

$ sudo yum install openssl

Now, to verify TLSv1.3 support on your server or website, run the following command.

$ sudo openssl s_client -connect domain.com:443 -tls1_3