esxcfg-nas <options> [<label>]
-a|--add                Add a new NAS filesystem to /vmfs volumes.
                        Requires --host and --share options.
                        Use --readonly option only for readonly access.
-o|--host <host>        Set the host name or ip address for a NAS mount.
-s|--share <share>      Set the name of the NAS share on the remote system.
-y|--readonly           Add the new NAS filesystem with readonly access.
-d|--delete             Unmount and delete a filesystem.
-l|--list               List the currently mounted NAS file systems.
-r|--restore            Restore all NAS mounts from the configuration file.
                        (FOR INTERNAL USE ONLY).
-h|--help               Show this message.