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For first time i need to upgrade a production server from RHEL4 to RHEL 5.can some help me in this regards. can any one share any documentation on upgradation.
Any help in this regards will be highly appreaciated
To add to the good advice that druuna gave, if you need to perform such tasks, the first people I'd ask would be Red Hat support...since you're paying for it with your RHEL subscription, right?? If you're not paying, then you should NOT use it, since all you're doing is running an unsupported/unpatched system, which will NOT receive bugfixes/security fixes/udates since it's not registered with the Red Hat network. Load the latest version of CentOS instead, which is 99.x% identical to RHEL, but FREE.
Red Hat does not support in-place upgrades between any major versions of Red Hat Enterprise Linux. (A major version is denoted by a whole number version change. For example, Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6 are both major versions of Red Hat Enterprise Linux).
Any have i have succesfully upgrade from RHEL4.8 to rhel 5.7. As application team demanding for upgradation not for fresh installation i need to go for upgradtion.
Thanks for the support
They were not 'suggestions'...you CANNOT upgrade between major versions, period. Your application team may 'demand' whatever they want, but if YOU are the admin, then YOU provide the system. You don't 'demand' their application does something in particular, to have it suit you.
If you want more advice, contact Red Hat support, as has been suggested to you in the past.