This is a yum question but relates to some work I am doing with CentOS and other recent discussions on this list so I though I would post here first.
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.
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.
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"?
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?
If I put an obsoletes: tag into centos-logos will yum do that for me? Is that a good idea?
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.
John.