[CentOS] centos 3.3 to 4.x?

Fri Jan 5 10:14:27 UTC 2007
Johnny Hughes <mailing-lists at hughesjr.com>

On Thu, 2007-01-04 at 16:00 -0500, Phil Schaffner wrote:
> On Thu, 2007-01-04 at 07:03 -0800, R Lists06 wrote:
> <snip>
> > Anyone ever upgrade from 3.x to 4.x
> Yes, with anaconda and the "upgradeany" option.  Upgrades across major
> kernel and glibc versions are at best very difficult with yum/apt-get.
> The most likely result of attempts to upgrade across major versions with
> package management tools is a broken system.
> > without problem
> Not really.  Expect lots of left-over orphan packages and problems with
> system and end-user configurations.
> > and how so?
> Use "rpm -qa --last" to find packages that pre-date the upgrade and deal
> with them by removal and/or forced/manual updates.  Look for all the
> *.rpm* files in /etc/... and reconcile differences with current versions
> of config files.  Fix numerous user GUI/application problems.
> Or [highly recommended], back up config files and user files to
> accessible media and do a clean install.  Use the backup as
> model/example to configure the new system.  Create new user home
> directories and selectively copy/link stuff as required from the backup.
> Keeping old GNOME/KDE configurations in place is guaranteed to cause
> problems.  I like to keep the old installation on-line and still
> bootable and accessible and do a fresh install on a separate hard disk
> (or at least on separate partitions) and be able to boot back to the
> previous version as a fall-back.
> Phil

I want to second Phil's advise and exactly what I would recommend.
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