[CentOS] Upgrade from 4.4 to 5

[Phil Schaffner]

On Tue, 2007-01-09 at 02:20 +0000, Karanbir Singh wrote:
> Guillermo Garron wrote:
> > Hi List,
> > 
> > Do you think that will be possible to upgrade from 4.4 to 5?
> 
> so far in the testing thats been done - it seems so Yes it will be 
> possible. The update route is something that we want to *try* and have 
> in place by the time CentOS-5 is released.

Just for grins, I did a VMware install of CentOS 4.3 Workstation+KDE
(didn't have a 4.4 DVD lying around) and immediately updated to
RHEL5-Beta with "linux upgradeany".  The upgraded VM worked (booted at
least) but did 600+ updates on the first "yum update" with yum repos
pointed to a directory tree of all the current RHEL5 Workstation Beta
packages.  Apparently anaconda didn't see all the available packages due
to the product key I used.  After the update, there were still several
dozen orphan CentOS4 packages left over according to "rpm -qa --last".

So, based on this quick/dirty test - looks like update will be possible,
but as usual, not easy or to-be-recommended.

Phil