今天在调试rabbitmq时候，使用rabbitmqctl.bat list_users命令查看rabbitmq已有用户时候报错了，错误如下：
Error: unable to perform an operation on node 'rabbit@DESKTOP-R8EILKD'. Please see diagnostics information and suggestions below.
Most common reasons for this are:
* Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues)
* CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that of the server)
* Target node is not running
In addition to the diagnostics info below:
* See the CLI, clustering and networking guides on https://rabbitmq.com/documentation.html to learn more
* Consult server logs on node rabbit@DESKTOP-R8EILKD
* If target node is configured to use long node names, don't forget to use --longnames with CLI tools
DIAGNOSTICS
===========
attempted to contact: ['rabbit@DESKTOP-R8EILKD']
rabbit@DESKTOP-R8EILKD:
* connected to epmd (port 4369) on DESKTOP-R8EILKD
* epmd reports: node 'rabbit' not running at all
no other nodes on DESKTOP-R8EILKD
* suggestion: start the node
Current node details:
* node name: 'rabbitmqcli-2200-rabbit@DESKTOP-R8EILKD'
* effective user's home directory: C:Users18838
* Erlang cookie hash: XO2VxV30/Spco0KwTrhIxA==
百度了一下解决方案，各种各样，试了几种 ，有一种解决了我的问题，记录一下：
将C:Windowssystem32configsystemprofile.erlang.cookie中的.erlang.cookie文件，复制一份到错误提示中的地址，我这里是“C:Users18838”，该路径下已经有了一个同名文件，覆盖就好了。