https://blog.csdn.net/witsmakemen/article/details/22651365

[root@d bin]# rabbitmqctl start_app
Starting node rabbit@d ...
Error: unable to connect to node rabbit@d: nodedown

DIAGNOSTICS
===========

attempted to contact: [rabbit@d]

rabbit@d:
* connected to epmd (port 4369) on d
* epmd reports: node 'rabbit' not running at all
no other nodes on d
* suggestion: start the node

current node details:
- node name: 'rabbitmq-cli-10600@d'
- home dir: /var/lib/rabbitmq
- cookie hash: DMtPWf84TZZx78acX9dYtQ==

[root@d bin]# ll -as

/ hostname  newname

查命令目录、数据目录、bin脚本代码

RabbitMQ - hostname change http://rabbitmq.1065348.n5.nabble.com/hostname-change-td24717.html