Porkbun is very good domain registrar. We can download free SSL from porkbun dashboard. All we need is to upload it into our VPS server and need to add the path of the certificates into virtual host file.
nginx
Installing WordPress MU in LEMP stack
Wordpress MU is a feature in which we can run multiple wordpress sites using only a single wordpress installation. That means, the users, themes, plugins will be common, but the contents will be different for different sites.
Host Multiple Sites with SSL in Ubuntu 18.04
In this tutorial we shall share all the commands necessary to host multiple websites in a VPS server. We used VPS servers from Linode and Digital Ocean. Both are excellent and best value for money.
Multiple WordPress with SSL in Ubuntu 16.04
Complete guide to host multiple WordPress sites in a LEMP stack in a Ubuntu 16.04 LTS. Installation of SSL by Let’s Encrypt has been illustrated also.
FastCGI Caching with Nginx on VPS for WordPress
The best plugin for caching sites on Nginx server is to use no plugin at all. Nginx has built in caching module which is called FastCGI. It is the best performer on LEMP stack.