This document provides a summary of the Nutanix command-line interface (nCLI) and commands that can be run on the Controller VM to manage the Nutanix cluster. The nCLI allows administrators to run commands against the Nutanix cluster from a local machine or any Controller VM. The cluster command is used to manage the cluster and performs actions like starting, stopping, upgrading and configuring the cluster. The document also outlines various configuration parameters and file paths used by cluster management components.