A command on Linux Mint to find out which server software (Apache, Nginx, Litespeed, etc.) is running on my website

curl -I http://yourwebsite.com

Replace yourwebsite.com with your website's URL. You can use both http:// and https:// depending on whether your website uses HTTPS. For example:

curl -I http://fmr.life

In the response, look for the line starting with "Server:". This line will indicate which server software your website is running on.