They were probably running RHEL5, but even in 2014 they would have been in the Production 3 phase which is really should only be used for legacy purposes, and that&#x27;s definitely not the sort of system you push new software to. Red Hat even pushes those customers towards virtualization because a) hardware rarely lasts 7 years and b) they won&#x27;t bother backporting drivers for new hardware to the old kernel at that point.<p>I still use a few RHEL5 machines but nobody would ever dream of pushing new software to them.