# Juju

> Juju is an open source orchestration engine for deploying, integrating, and managing applications across Kubernetes, VMs, and bare metal using software operators called charms.


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## Pages in this subsection

- [Checker](https://documentation.ubuntu.com/juju/3.6/contributor/reference/testing/unit-testing/checker.md): Use gocheck checkers for assertions in Juju unit tests, including IsNil, Equals, DeepEquals, and ErrorMatches patterns.

## Optional

- [Top-level llms.txt](https://documentation.ubuntu.com/juju/3.6/llms.txt): Complete documentation index.