You can specify the web root of the domain you are trying to validate using the webroot plugin, meaning that you do not have to stop your current HTTP server or

You can specify the web root of the domain you are trying to validate using the webroot plugin, meaning that you do not have to stop your current HTTP server or run another one, it just adds the verification file to your website's root. ./letsencrypt-auto --webroot-path=/home/cuonic/cuonic.com