If rabbit is installed by default, the default installation location is generally: /usr/lib/rabbitmq.

You can also execute the command to find the installation location: whereis rabbitmq.

Note: everywhere, I am at /etc/rabbitmq.

edit

Add config _ file =/etc/rabbitmq/rabbitmq.conf to the file, save and exit.

Port valid

Execute the command: journalctl -xe at the prompt to see the reason for the failure.