KC.Gmail wrote:
> Hi,
> 
> I'm both SL and Fedora Core user.  For FC, eg FC2, I always
> keep my system up-to-date by using 'yum'.   I found that a
> updated FC2 is still NOT a FC3 or FC4.
> 
> For SL, I have a SL4.2 use as my mail/www server.  I recently
> upgrade the SL4.2 by 'yum' and found some SL4.4 packages are
> installed ???
> 

Such as ???

> I believe I probably can't simply upgrade a SL3.x to SL4.x by yum but
> does a up-to-date SL4.2 is SL4.4 ?
> 

The packages for SL4x (SL 4.0, 4.1, 4.2, 4.3, 4.4) are all compatible 
with each other.
When we release security errata for SL 4x, it is the exact same package 
that goes to all of them.  We always build on the oldest release we 
have, which is SL 4.0 (with security updates).  This way it's compatible 
with the oldest, all the way up to the newest SL 4.x distibution.

So, our point releases (SL 4.2, 4.3, 4.4) are not the same as the 
various Fedora Core releases (3, 4, 5).  Fedora builds their security 
errata on wichever Core release they are compiling for.

Our point releases are comparable to RedHat's Updates (Update 2, Update 
3, Update 4) to RHEL4.  You are still running RHEL 4, but you have the 
newest bugfixes for that version of RHEL.

So, in the end, it IS possible to use yum to get from one point release 
to another, but if that happens without you doing something, then we've 
messed up and we need to fix it.

Troy
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Troy Dawson  [log in to unmask]  (630)840-6468
Fermilab  ComputingDivision/CSS  CSI Group
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