It says in the min req you need red hat ent 3.0. Can we use Red Hat ent 5? since 3.0 is quite old.
Also are we stuck with Redhat or we could use debian or another linux flavor
Sorry for the delay in responding.
If you have the CD version of 6.2.3 and you have a license, you should not have any problem downloading from CCO and 6.3 accepts any 6.x key...so you should be good to go.
Try this link (requires CCO id/registration):