The Standalone ESXCLI tool allows for remote management of ESXi hosts using the ESXCLI command set. ESXCLI was previously part of the vSphere CLI and is now provided as a separate package. The ESXCLI in vSphere CLI will no longer be updated.
Usage of ESXCLI in the standalone package is the same as its usage in the vSphere Command-Line Interface. You can find information on this command in the vSphere Command-Line Interface Reference.