On 2/23/2013 2:33 PM, Bassem Sossan wrote:

Since CentOS is a clone of RedHat, can I ask about the depeandable references guides of RedHat that are produced by RedHat itself, such as RH033 and so on...

I need to know which is the latest copyright of this suit ( RH033, RH133 and RH253 )

those are courses, not reference guides, and they were all retired in 2010, and replaced with newer courses. first hit on google for 'rh033' would have given you this information. https://www.redhat.com/courses/retired/