How to test and debug NGINX configuration?
While configuration can be tested with command service
nginx configtest, there is a more convenient way to do
this - and immediately get whats wrong.
There is a command nginx -t, which test
configuration and display error messages. Both commands must be
used with sudo or permission denied messages might
be shown (regarding SSL certificates for example).
Command to test and reload if it's ok:
sudo nginx -t && sudo service nginx reload