# 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 - [How to manage credentials](https://documentation.ubuntu.com/juju/4.0/howto/manage-credentials.md): Manage cloud credentials in Juju: add, update, validate, and remove credentials for machine clouds and Kubernetes clusters. ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/juju/4.0/llms.txt): Complete documentation index.