RabbitMQ is an open-source message broker that enables distributed applications to communicate through message queues, decoupling producers and consumers across services. This guide installs RabbitMQ on Ubuntu 26.04, enables the management plugin, creates an admin user, and secures the web dashboard with Nginx and a Let's Encrypt certificate. By the end, you'll have RabbitMQ running with a secure management interface accessible over HTTPS.

Install RabbitMQ

RabbitMQ is available in Ubuntu 26.04's default APT repository.

1. Update the APT package index:

$ sudo apt update

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2. Install Erlang and RabbitMQ:

$ sudo apt install gnupg erlang rabbitmq-server -y

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What you just installed:

erlang : the runtime RabbitMQ is built on

rabbitmq-server : the message broker daemon

3.…