https://www.nginx.com/resources/wiki/start/topics/tutorials/commandline/
Binary is usualy found at: /usr/bin/nginx # Or: /usr/sbin/nginx
Or find the one that is working: ps -ef|grep nginx
Service controle: /etc/init.d/nginx
To test the conf files but not running them: nginx -t
Stop nginx (Graceful Shutdown): /usr/bin/nginx -s stop
Or: kill -QUIT $( cat /usr/local/nginx/logs/nginx.pid )