Re: password-less public-key authenticated ssh

 If you can't figure out where to get those on your own, there's no way you'll be able to make them work! www.google.com is your friend.

You need NFS in order to use more than one machine, but MPITB will also let you use both cores of a single machine. The portability of MPI from multi-core machines to clusters to supercomputers is one of its great advantages.