Which Nginx and which config file is used

You shall be able to see the master process:

florin@vm:~$ ps aux | grep nginx
root       884  0.0  0.0  76944  1308 ?        Ss   10:28   0:00 nginx: master process /usr/sbin/nginx

The execute:

$ /usr/sbin/nginx -V 2>&1 | grep --colour=auto conf

It shall give you a --conf-path=/etc/nginx/nginx.conf somewhere around there.

~# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

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