[CentOS] Upgrade RedHat 9 to Fedora

Wed Aug 3 06:44:18 UTC 2005
sudo Yang <sudoyang at gmail.com>

What would be the easiest way to upgrade 2000 servers from RedHat 9 to
Fedora or RedHat Enterprise/CentOS?  Also, 1/2 of these systems have 1
TB data partition that cannot be destroyed.

Would an upgrade option work via Kickstart?