如何管理服务？
Nginx/Tengine/OpenResty:
service nginx {start|stop|status|restart|reload|configtest}
MySQL/MariaDB/Percona:
service mysqld {start|stop|restart|reload|status}
PostgreSQL:
service postgresql {start|stop|restart|status}
MongoDB:
service mongod {start|stop|status|restart|reload}
PHP:
service php-fpm {start|stop|restart|reload|status}
HHVM:
service supervisord {start|stop|status|restart|reload}
注：hhvm进程交给supervisord管理
Apache:
service httpd {start|restart|stop}
Tomcat:
service tomcat {start|stop|status|restart}
Pure-Ftpd:
service pureftpd {start|stop|restart|status}
Redis:
service redis-server {start|stop|status|restart}
Memcached:
service memcached {start|stop|status|restart|reload}