军歌紧急求救，502 Bad Gateway，重启NGINX也无效

y1219

LNMP1.1版本，昨天还好好的，今天突然无法访问，重启系统和重启NGINX都不行，怎么办啊
[root@localhost ~]# /root/lnmp restart
=========================================================================
Manager for LNMP V1.1  ,  Written by Licess
=========================================================================
LNMP is a tool to auto-compile & install Nginx+MySQL+PHP on Linux
This script is a tool to Manage status of lnmp
For more information please visit http://www.lnmp.org

Usage: /root/lnmp {start|stop|reload|restart|kill|status}
=========================================================================
Stoping LNMP...
Stoping nginx...  done
Gracefully shutting down php-fpm . done
Shutting down MySQL. SUCCESS!
Starting LNMP...
Starting nginx...  done
Starting php-fpm  done
Starting MySQL.. SUCCESS!
[root@localhost ~]#

[ 本帖最后由 y1219 于 2015-3-5 07:44 编辑 ]

licess

502的话就是置顶帖里说的哪几种可能原因

y1219

试了不行啊，能通过哪些办法排查吗