On Wed, 2007-05-23 at 14:07 -0600, Stuart Jansen wrote:
> To be absolute correct, it very compatible, probably even bug-for-bug
> compatible, but not compatible in every way. I have stumbled across very
> minor, obscure differences.

Such differences are probably CentOS bugs and probably ought to be
reported, unless they deal with something that RHEL doesn't have, such
as yum back in CentOS 4.

> 
> And then, of course, there's the major differences. CentOS 4 used YUM
> before RH adopted it for RHEL5. While RHEL5 comes in Server, Client and
> Desktop flavors, CentOS has one all encompassing version since they
> don't care about licensing.

These differences are typically visible to programs at the OS level.  If
I need Xen in CentOS, I just yum install it.  In RHEL you do too, once
you make sure you have the right RHN channels set up.

> 
> But they're close enough that you can usually close your eyes and
> pretend they're the same.

In fact I've gone back and forth between the two on the fly.  Last week,
for example, Redhat messed up my subscription account update, so while I
waited for them to fix that, I installed the three centos rpms, and yum
updated a few things.  Then when they fixed my account, I put the redhat
yum and release stuff back in, and yum just kept on automagically
working.  

In the past I've started with CentOS and then moved to RHEL and vice
versa.  All depended on what I needed at the time.

> 
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