We have two server running on RHEL 5.5. Now we have to upgrade it to 5.6
What are the steps to upgrade it and also the prerequisites
Some sources say to:
Although the RHEL documentation, albeit not very clear, says to use the CD/installer and select the "upgrade" option. See Common Tasks (chapter 24).
Have a look at CentOS 5.6 Release-Notes - Known Issues. The same should be true for RHEL 5.6.
Since you are upgrading from 5.5 (and NOT an earlier version) to 5.6
Should be enough. The described iSCSI-client-bug might apply to you.