On Sun, 2005-09-18 at 15:31 -0700, Dave Laird wrote: > The situation that originated this query took place recently when I > tried > to do a CD-based upgrade from 3.3 to 4.1, and although the install > medium > did search for previous instances of CentOS, it never found one (it > was > there, really!) and continued to try reinstalling the entire OS. The trick there is to specify the "upgradeany" switch - otherwise no supposedly-upgradable system is found. My conjecture is that this is because Red Hat discourages upgrades. A clean install with backups of config files (and likely /home, and possibly /var/www and /usr/local) available for customizing is still probably the best bet. Phil