Let's say I've got an RHEL machine that is running RHEL5.4. I'd like to upgrade it to 5.7 (latest), but the vendor that makes the software sitting on the machine only certifies it to 5.6. How can I upgrade to 5.6 but make sure I don't end up in 5.7 land? I'm sure I'm missing something basic here, but I can't find it.
Same question applies to CentOS, I suppose, so if someone has an answer there I'd try it.