An extension of Azure for running apps in an on-premises environment and delivering Azure services in a datacenter.
You can download the AzureStack HUB SDK from the GitHub repository AzureStack-Tools: https://github.com/Azure/AzureStack-Tools.
The SDK will be downloaded as a ZIP file. You can extract the ZIP file to a folder on your computer.
Once you have downloaded the SDK, you can install it by following the instructions in the README: https://github.com/Azure/AzureStack-Tools/blob/master/README.md file.