To install RabbitMQ on Ubuntu 26.04, follow these steps.
Step 1 : Update.

Step 2 : Install RabbitMQ.


Step 3 : Enable and start.

Step 4 : Enable the management plugin.

Step 5 : Restart.

Step 6 : Create an admin user. Change changeme. The guest user is localhost-only.

Step 7 : Allow the UI port.

Step 8 : Open the UI.

Log in as admin with the password from step 6, then Login.

You have installed RabbitMQ on Ubuntu 26.04.