# 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 - [`juju-db-repl`](https://documentation.ubuntu.com/juju/4.0/reference/juju-db-repl.md): juju-db-repl reference: Dqlite REPL interactive SQL shell for querying Juju controller and model databases. ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/juju/4.0/llms.txt): Complete documentation index.