> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/cortex-xsoar-8-on-prem/8.11/configure-cortex-xsoar/engines/install-an-engine/docker.md).

# Docker

Docker is a software framework for building, running, and managing containers.

{% hint style="info" %}

### Note

This section is relevant when installing an engine.
{% endhint %}

Cortex XSOAR maintains a repository of Docker images, available in the Docker hub under the [Cortex](https://hub.docker.com/u/demisto/) organization.

Each Python/PowerShell script or integration has a specific Docker image listed in the YAML file. When the script or integration runs, if the specified Docker image is not available locally, it is downloaded from the Docker Hub or the Cortex Container Registry. The script or integration then runs inside the Docker container. For more information on Docker, see the [Docker documentation](https://docs.docker.com/) and [Using Docker](/cortex-xsoar-8-on-prem/8.11/configure-cortex-xsoar/integrations/change-the-docker-image-in-an-integration-or-script.md).

{% hint style="info" %}

### Note

Docker images can be [downloaded](/cortex-xsoar-8-on-prem/8.11/configure-cortex-xsoar/engines/install-an-engine/engine-air-gap-installation.md) together with their relevant content packs, for offline installation.
{% endhint %}


---

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