fakessh @ wrote on 02/03/2012 05:43 PM:
but possible or I may strongly advises against
I would strongly advise against blindly overwriting /var and /etc (or anything else, with the possible exception of /home) from a CentOS-6 install with CentOS-5 versions. Compare the files and make changes on a case by case basis as required. More work but MUCH less chance of breakage.
Phil