启动服务：rabbitmq-server start &
      
     出现：ERROR: node with name "rabbit" already running on "localhost"
      
     解决步骤：

        1、查找rabbitmq相关进程
           ps -ef | grep rabbitmq 
        2、杀掉对应的进程
           kill  进程ID
        3、再次启动服务
           rabbitmq-server start &
        4、查看启动状态
           lsof -i:5672
     启动成功后：
        日志路径 
          /usr/fy/software/rabbitmq/rabbitmq_server-3.6.15/var/log/rabbitmq/rabbit@localhost.log
  	  /usr/fy/software/rabbitmq/rabbitmq_server-3.6.15/var/log/rabbitmq/rabbit@localhost-sasl.log

关闭服务：rabbitmqctl stop