There is one small'n'hidden feature of RHEL 6.2 that popped up recently as an enhancement errata (RHSA-2011-1581). With this update, SystemTap probes have been added to the Ruby package. I was waiting for this feature, because at the time I was reading Aaron Patterson's excelent articleabout Ruby probing, this was not possible in Fedora or Red Hat Enterprise Linux by default. I mean without compil