The virtual machine image is based on CernVM (cernvm.cern.ch), with Scientific Linux CERN 5 (slc5), which is the environment needed for the CMSSW release to be used with the 2010 CMS open data. Access to the data is through XRootD.
How can you use this?
Please follow the tutorial on how to use the CMS Virtual Machine
The open data are released under the Creative Commons CC0 waiver. Neither CMS nor CERN endorse any works, scientific or otherwise, produced using these data. All releases will have a unique DOI that you are requested to cite in any applications or publications.