LLNL - Lawrence Livermore National Laboratory (USA)
LLNL provides several tutorials. Not all are applicable to the VSC clusters, but some are. E.g.,
There are also some tutorials on Python.
NCSA - National Center for Supercomputing Applications (USA)
NCSA runs the CI-Tutor (Cyberinfrastructure Tutor) service that also contains a number of interesting tutorials. At the moment of writing, there is no fee and everybody can subscribe.