See you have no clue on how the Open Source model works. Well nither did I know when I started and even now I can't claim to know it perfectly.red_hat said:ok i thought since RHEL is Enterprise version it will be better than Fedora
So I chose RHEL.
But, in the Open Source arena. It's rather community projects which are usually better. Some reasons are listed below
1) It is used extensively by the community so it is well tested
2)It has lots of developers who happen to be the users of the software too, so it's some issues which aren't well tackled in enterprise systems so well are addressed in the community distro.
3) RHEL, SLED,etc are optimised for server usage. This doesn't mean it's bad for desktop or anything as such but it will be some steps beyond FC or OpenSUSE cos most geeks in the community will be using FC, SUSE, Ubuntu,etc so the documents you will get hold of on the net for the latter will be far better.
There are more points but I can't remember some and am feeling lazy to write down more, too. So, using RHEL or it's clone CentOS will not give you any advantage whatsoever over FC, unless you pay for RHEL and get tech support from RH.
I am not so familiar with yum so can't help you about the yum problem now, but I will look it up if I get time soon and it has not been answered.