How To Use Certbot Standalone Mode to Retrieve Let's Encrypt SSL Certificates
[Let’s Encrypt](https://letsencrypt.org/) is a service that offers free SSL certificates through an automated API. The most popular Let’s Encrypt client is [EFF](https://www.eff.org/)’s [Certbot](https://certbot.eff.org/) client. Certbot offers a variety of ways to validate your domain, fetch certificates, and automatically configure Apache and Nginx. In this tutorial, we’ll discuss Certbot’s [standalone mode](https://certbot.eff.org/docs/using.html#standalone) and how to use it to secure other types of services, such as a mail server or a message broker like [RabbitMQ](https://www.rabbitmq.com/).
CentOS
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Debian
How To Use Certbot Standalone Mode to Retrieve Let's Encrypt SSL Certificates on Debian 10
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Ubuntu
How To Use Certbot Standalone Mode to Retrieve Let's Encrypt SSL Certificates on Ubuntu 22.04
How To Use Certbot Standalone Mode to Retrieve Let's Encrypt SSL Certificates on Ubuntu 20.04
How To Use Certbot Standalone Mode to Retrieve Let's Encrypt SSL Certificates on Ubuntu 18.04
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