Final answer:
Azure CLI and Azure PowerShell are the Azure tools that can be used on Ubuntu machines.
Step-by-step explanation:
The Azure tools that can be used on Ubuntu machines are Azure CLI and Azure PowerShell. These command-line tools allow developers and system administrators to manage and interact with Azure resources directly from their Ubuntu machines. With Azure CLI and Azure PowerShell, users can create and manage virtual machines, deploy applications, configure networking, and perform many other tasks on Azure.