I fixed some things and now the system is ready to work as Kindleberry (I hope).
The ssh client is installed and I tryed to ssh into mb & pi and both work properly.
The last thing to do is prevent the situation that caused the problem last time.
But this time, I think that the problem may not occur.
My theory: the problem with loop devices occur when I tryed to make several access to an image contained in ELFP (this is the normal because I call the program from KUAL several times). When the loop devices created fill the (programmed) tree the system give the error.
In this case, since the ssh client provided by
twobob instead by ELFP, no image is used and then the problem is automatically fixed...
The explanation is convincing?