This guide assume PHP FPM (FastCGI Process Manager) already installed with Nginx and configured using tcp port (127.0.0.1:9000)

How to restart PHP FPM? How to start or reload php-fpm for nginx?

Stop PHP FPM command: service php-fpm stop

Start PHP FPM command: service nginx start

Restart PHP FPM command: service php-fpm restart

Reload PHP FPM command: service php-fpm reload

PHP-FPM command line Usage: /etc/init.d/php-fpm {start|stop|status|restart|reload|force-reload|condrestart|try-restart}

Connecting nginx to PHP FPM: http://wiki.nginx.org/PHPFcgiExample