Hi Alessio,

Did you read about this on stackoverflow.com?

I found these:
1.) http://stackoverflow.com/questions/21643697/error-could-not-find-or-load-main-class-org-apache-hadoop-util-versioninfo
2.) http://stackoverflow.com/questions/19363402/classpath-issue-in-hadoop-on-cygwin-while-running-hadoop-version-command

Bye