Will McDonald wrote: > We went from various RH9 and earlier and FC3 and earlier builds > straight to WBEL/CentOS 4 and in every case backed-up, rebuilt the box > from scratch then pieced configs back together as much as possible in > keeping with OS defaults, trying to fit in to the RHEL way. > > I think I recall from previous similar threads that people *have* > upgraded from 3 to 4 but the general concensus was that if you can, > you should rebuild from scratch. > > The main benefit being any configuration gotchas will be apparent > straight away as you're configuring each specific aspect of your/their > system. > > Will. I just spent 2-3 weeks migrating our application to CentOS 4.4 from RH9. We had all kinds of fun stuff to deal with, like porting a newer version of yum (and all it's dependencies except sqllite :P) to support our custom RPM of python24, and we're still doing a little bit of work porting 4 custom apache modules to the 2.0 API because glibc23 doesn't play nice with apache 1.3.xx, and there's a host of custom RPMS (about 90) that we had to rebuild to play nicely with CentOS 4.4, but all in all, it went pretty smooth. Attempt to do this in place on a live system? Now that's plain crazy. The only OS I know of that does an in-place upgrade for a major version number is FreeBSD via cvsup, and it's not all that hairy, but you may have to recompile your few non-stock components. Peter -- Peter Serwe <peter at infostreet dot com> http://www.infostreet.com "The only true sports are bullfighting, mountain climbing and auto racing." -Earnest Hemingway "Because everything else requires only one ball." -Unknown