This guideline is to Install single domain SSL (Secure Socket Layer) certificate in a Wordpress site running in a Nginx web server. No plugins are used. We bought SSL from namecheap.com.
Optimization of nginx web server for best performance by changing number of worker_processes, enabling gZip compression, disabling acess log, reducing keepalive_timeout value.
If one site gets compromised, the others are also in risk. However, this risk may be overcome in php-fpm by creating a different pool which runs under a different user for each nginx virtual host.
Be careful, your server IP is not forwarding to your website’s domain name. Search engines like Google are now able to index your website with its IP instead of its domain name. This will result in duplicate content.
How to host multiple websites in a Linode on Debian linux distribution, Nginx as web server, MySQL as database, PHP5-FPM as language processing from Windows PC.