1：启动rabbitmq，提示ERROR: node with name "rabbit" already running on "localhost"
解决：
杀掉 localhost 进程
2:rabbitmq卸载安装命令总结，以及遇到的坑
https://blog.csdn.net/zwhfyy/article/details/82769736
3:安装的时候记得导入 key文件
1）下载rabbitmq
wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.6/rabbitmq-server-3.6.6-1.el7.noarch.rpm
2）导入key文件
rpm --import http://www.rabbitmq.com/rabbitmq-signing-key-public.asc
3）安装rabbitmq ：
yum install -y rabbitmq-server-3.6.6-1.el7.noarch.rpm
4：安装成功参考 https://www.cnblogs.com/wangfg/p/6895017.html
原文：https://www.cnblogs.com/wanwhl/p/10981673.html