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