Oct 202017

This tutorial will show you how to install and secure a Nginx web server on Debian 9 with a TLS certificate issued for free by the Let’s Encrypt Certificate Authority. Furthermore, we will configure automatic renewal of Lets’ Encrypt TLS certificates using a cron job before the certificates expire.
Install Let's Encrypt and Secure Nginx with SSL/TLS in Debian 9
Source: HowtoForge Linux Tutorials