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put ( LOCAL_FILE [, REMOTE_FILE ] )

Put a file on the remote server. LOCAL_FILE may be a name or a filehandle. If LOCAL_FILE is a filehandle then REMOTE_FILE must be specified. If REMOTE_FILE is not specified then the file will be stored in the current directory with the same leafname as LOCAL_FILE.
Returns REMOTE_FILE, or the generated remote filename if REMOTE_FILE is not given.

NOTE: If for some reason the transfer does not complete and an error is returned then the contents that had been transfered will not be remove automatically.