Thanks for your reply. I guess for now I will stick with my bash script. I'll put it up on my web site http://uranus.it.swin.edu.au/~jn/linux/centos-2/migration.htm John. seth vidal wrote: >>Basically I am attempting a Red Hat 7.2 -> CentOS-2 upgrade. So far it >>has worked like a charm. The problem is though that yum (no doubt by >>design) will not downgrade packages to the CentOS versions. > > > yep. True. > > > >>The problem is that some old RPMs have 72 in the release (for Red Hat >>7.2) and the newer package as 21 in the release (For Enterprise Linux >>2.1). Some others are updates to 7.2 which increased the version number >>where as 2.1 got a backported fix and increased release number. > > > which is what happens when something branches earlier. > > > >>Is there a way to make yum always select a particular Vendor or >>Distribution? What about using yum to do an explicit downgrade >>"yum install mypackage-version-oldrelease"? > > not for yum 1.0.X or 2.0.X. 2.1.x can but it's not going to work on a > rhl 7.2 or rhel2.1 one system. > > > > >>Also, this is an rpm question, does anyone know if I can do >>"rpm --erase redhat-logos" and "rpm -i centos-logos" at the same time? > > rpm --erase --nodeps redhat-logos ; rpm -i centos-logos > > they'll only be logo-free for a brief moment :) > > > > >>If I put an obsoletes: tag into centos-logos will yum do that for me? >>Is that a good idea? > > > yum upgrade will do obsoletes, yes. > > >>At the moment I have a bash script which trys to work out the downgrade >>rpm commands but I can not check dependencies. Any other suggestions, >>tips or tricks would be appreciated. > > > it's not hard to do a version comparison on any package in the tree > versus those installs and you could do: rpm -Uvh --oldpackage stuff > > -sv > > > _______________________________________________ > CentOS mailing list > CentOS at caosity.org > http://www.caosity.org/mailman/listinfo/centos > > > -- John Newbigin - Computer Systems Officer School of Information Technology Swinburne University of Technology Melbourne, Australia http://www.it.swin.edu.au/staff/jnewbigin