How to understand which nginx.conf is being used?

Question

linux

I read in the manual that the configuration file is called nginx.conf and is located in one of the directories
/usr/local/nginx/conf
/etc/nginx
/usr/local/etc/nginx.
But I have this file present in the first two.
How to understand which one is used and where it is configured/

Answer 1

nginx -V, then see parameter conf-path.

Answer 2

2

Answer 3

/etc/init.d/nginx configtest
should show which config is testing and whether everything is fine with it