# 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. 2026 CC-BY-SA, Canonical Ltd. ## Pages in this subsection - [Manage the databases](https://documentation.ubuntu.com/juju/4.0/howto/manage-the-databases.md): Manage the Juju database: access controller and model databases, switch between them, run SQL queries, inspect schema using the REPL. ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/juju/4.0/llms.txt): Complete documentation index.