Ok. "Undefined" is not good. :-S
For the URL stuff: you can "cd REST-for-TYPO3-rest.cundd.net". I thought of the links as if they where folders where you can step into.
Oh, now that's cool ! I see you've added a "help" command. And "cd REST-for-TYPO3-rest.cundd.net" makes a lot of sense now that I can see that "REST-for-TYPO3-rest.cundd.net" is a directory with the "ll" command.