# 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

- [Hook command](https://documentation.ubuntu.com/juju/4.0/reference/hook-command.md): In Juju, a **hook command** is a Bash script located in `/var/lib/juju/tools/unit-<app name>-<unit I...
- [List of hook commands](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands.md): This stub is the index file for the hook command reference, the contents table below is
- [`action-fail`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/action-fail.md): Sets action fail status with message.
- [`action-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/action-get.md): Gets action parameters.
- [`action-log`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/action-log.md): Records a progress message for the current action.
- [`action-set`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/action-set.md): Sets action results.
- [`application-version-set`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/application-version-set.md): Specifies which version of the application is deployed.
- [`close-port`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/close-port.md): Registers a request to close a port or port range.
- [`config-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/config-get.md): Prints application configuration.
- [`credential-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/credential-get.md): Accesses cloud credentials.
- [`goal-state`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/goal-state.md): Prints the status of the charm’s peers and related units.
- [`is-leader`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/is-leader.md): Prints application leadership status.
- [`juju-log`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/juju-log.md): Writes a message to Juju logs.
- [`juju-reboot`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/juju-reboot.md): Reboots the host machine.
- [`network-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/network-get.md): Gets network config.
- [`open-port`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/open-port.md): Registers a request to open a port or port range.
- [`opened-ports`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/opened-ports.md): Lists all ports or port ranges opened by the unit.
- [`relation-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/relation-get.md): Get relation settings.
- [`relation-ids`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/relation-ids.md): Lists all relation IDs for the given endpoint.
- [`relation-list`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/relation-list.md): Lists relation units.
- [`relation-model-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/relation-model-get.md): Gets details about the model housing a related application.
- [`relation-set`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/relation-set.md): Sets relation settings.
- [`resource-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/resource-get.md): Gets the path to the locally cached resource file.
- [`secret-add`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-add.md): Adds a new secret.
- [`secret-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-get.md): Gets the content of a secret.
- [`secret-grant`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-grant.md): Grants access to a secret.
- [`secret-ids`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-ids.md): Prints secret IDs.
- [`secret-info-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-info-get.md): Gets a secret’s metadata info.
- [`secret-remove`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-remove.md): Removes an existing secret.
- [`secret-revoke`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-revoke.md): Revokes access to a secret.
- [`secret-set`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/secret-set.md): Updates an existing secret.
- [`state-delete`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/state-delete.md): > See also: state-get, state-set
- [`state-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/state-get.md): > See also: state-delete, state-set
- [`state-set`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/state-set.md): > See also: state-delete, state-get
- [`status-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/status-get.md): Prints status information.
- [`status-set`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/status-set.md): Sets status information.
- [`storage-add`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/storage-add.md): Adds storage instances.
- [`storage-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/storage-get.md): Prints information for the storage instance with the specified ID.
- [`storage-list`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/storage-list.md): Lists storage attached to the unit.
- [`unit-get`](https://documentation.ubuntu.com/juju/4.0/reference/hook-command/list-of-hook-commands/unit-get.md): Prints public-address or private-address.

## Optional

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