The cp command copies folders and files into the Registry as RegistryPackage and ExtrinsicObject objects, respectively.
The local directory on the local file system from which to copy files and folders defaults to the current directory from which you started the Admin Tool. You can use the -localdir option to change the local directory when you start the Admin Tool. You can use the lcd command to change the local directory after the Admin Tool has started. You can get the absolute path of the current local directory by using the show localdir command.
The command is recursive. That is, if you specify a directory, the command copies all the files and folders under the directory.