# 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

- [Release notes](https://documentation.ubuntu.com/juju/4.0/releasenotes.md): Juju release notes: features, fixes, and updates for CLI client and agents. LTS versions, patch releases, and version history.
- [Juju 4.0](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x.md): The 4th generation of Juju is a massive achievement that introduces major changes:
- [Juju 4.0.15](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.15.md): 🗓️ 23 Sep 2026
- [Juju 4.0.14](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.14.md): 🗓️ 18 Aug 2026
- [Juju 4.0.12](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.12.md): 🗓️ 28 Jun 2026
- [Juju 4.0.11](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.11.md): 🗓️ 2 Jun 2026
- [Juju 4.0.5](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.5.md): 🗓️ 7 Apr 2026
- [Juju 4.0.3](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.3.md): 🗓️ 4 Mar 2026
- [Juju 4.0.1](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.1.md): 🗓️ 22 Jan 2026
- [Juju 4.0.0](https://documentation.ubuntu.com/juju/4.0/releasenotes/juju_4.0.x/juju_4.0.0.md): 🗓️ 14 Nov 2025
- [Unsupported Juju releases](https://documentation.ubuntu.com/juju/4.0/releasenotes/unsupported.md): Archive of unsupported Juju releases: end-of-life versions no longer receiving security updates or bug fixes.
- [**Before Juju 2.9 (all EOL)**](https://documentation.ubuntu.com/juju/4.0/releasenotes/unsupported/juju_2.x.x.md): Juju 2.x release notes archive: versions before 2.9 that are end-of-life, including Juju 2.8 and earlier releases.
- [**Before Juju 3.6 (all EOL)**](https://documentation.ubuntu.com/juju/4.0/releasenotes/unsupported/juju_3.x.x.md): Juju 3.x release notes archive: versions before 3.6 that are end-of-life, including Juju 3.5, 3.4, 3.3, 3.2, 3.1, and 3.0.

## Optional

- [Top-level llms.txt](https://documentation.ubuntu.com/juju/4.0/llms.txt): Complete documentation index.