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To enable HTTPS on your website, you need a certificate from a Certificate Authority (CA). Let’s Encrypt is a nonprofit Certificate Authority providing Free SSL certificates to 225 million websites.  You can also get a (absolutely) free SSL certificate using Certbot. Certbot is open-source software tool recommended by Let's Encrypt to for automatically deploy SSL certificate. This certificate is as valid as a paid certificate. There are two ways to get and install certificate on your server. 1. When you have SSH access to your server. Then you have option to Generate and Deploy SSL certificate automatically by installing Certbot on your server. 2. When you are using a platform like Heroku (Paas) where you don't have SSH access to your server directly and can't install any package on it. In this case you can install Certbot at your local system (Linux) using below commands and use it only to generate certificate files. Later you can Deploy them manually. Install Certbot a...

Assuming you are well aware of What is an SSL certificate? Why we need it? here I am going to guide you for How you can apply an SSL certificate for your website hosted on Linux or Ubuntu Server using Apache 2 server. You can either purchase a new SSL certificate or can generate it for free on  sslforfree.com  which authorized by  Letsencrypt  the first non-profit CA. After Purchasing or getting your SSL certificate you have actually 2 SSL files, Certificate and Private Key. You can upload both SSL files (certificate.crt and private.key) on the server: Create a new folder in Directory `/home/user-name/.ssh`. Create or upload files certificate (.cert) file as certificate.crt and Private key (.key) as private.key in the folder created earlier. Now edit Virtual Host configuration for the website for which you want to apply the SSL certificate. sudo nano /etc/apache2/sites-enabled/{yourwebsitedomain.com}.conf Add the following code to website vhost config...