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Certbot

Secure communication over the Web relies on HTTPS, which requires the use of a digital certificate that lets browsers verify the identity of web servers (e.g., is that really google.com?). Web servers obtain their certificates from trusted third parties called certificate authorities (CAs). Certbot is an easy-to-use client that fetches a certificate from Let’s Encrypt—an open certificate authority launched by the EFF, Mozilla, and others—and deploys it to a web server.

Anyone who has gone through the trouble of setting up a secure website knows what a hassle getting and maintaining a certificate is. Certbot and Let’s Encrypt can automate away the pain and let you turn on and manage HTTPS with simple commands. Using Certbot and Let's Encrypt is free.

Install Core​

sudo snap install core
sudo snap refresh core
info

In most cases, core will be installed by default in Ubuntu

Install Certbot​

Choose your web server from the tabs mentioned below:

Install the certbot using the following command.

sudo snap install --classic certbot

Once you have installed the certbot then it’s time to issue the SSL certificate by running the following command.

sudo certbot --nginx
tip

On the first run, it might ask you for an email address to intimate critical information. Make sure to provide a valid email address, if asked.