[ Thanks to E.
Stride for this link. ]
“What general best practices or tips can you share to
make an upgrade to RHEL 5 a smooth one?“Tammy Fox: Performing an upgrade with the
installation program basically updates any existing RPM packages on
your system. If the new version of the package includes changes
that make your existing configuration invalid, some packages will
try to migrate your existing data, but it is not required…”