To start default configuration:

===> /QOpenSys/pkgs/bin/nginx -c /QOpenSys/etc/nginx/nginx.conf

To stop:

===> /QOpenSys/pkgs/bin/nginx -c /QOpenSys/etc/nginx/nginx.conf -s stop

To list processes:

===> ps aux | grep nginx

or

===> ps ax | grep nginx
===> ps -f -u ernest

Sample nginx configuration file:

worker_processes  3;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;

    keepalive_timeout  65;

    server {
        listen       9010;
        server_name  localhost;

        location / { try_files $uri @er; }
		location @er {
		    include fastcgi_params;
		    fastcgi_param PATH_INFO $fastcgi_script_name;
		    fastcgi_param SCRIPT_NAME "";
		    fastcgi_pass unix:/tmp/er9010f-fcgi.sock;
		}

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
        location ~ /\.ht {
            deny  all;
        }
    }
}

More on ps command: https://www.binarytides.com/linux-ps-command/