Upgrade from RH7.3 to CentOS experience??

I have done this on four practice servers and each time run into a few snags so I want to get some advice from some of you that have done it before to see where I might be going wrong.

What I have done is this.

Installed apt-get from freshrpms.com and the apt-get upgrade and aptget update to RH8 then to RH9 no problems there everything seems to go good.

But once I install yum and then start the yum upgrade to CentOS it seems that bind fails and I start getting segmentation faults then the yum upgrade bails and and I have to mv /lib/tls/ /lib/tls.disable in order to get bind running again so I can finish the upgrade.

Note I have done RH9 to CentOS upgrades with out problems so the problem seems to be in the up from 7.3 to 9 that makes the difference.

Also Apache seems to fail with a libso module error I just do a recompile of apache and that fixes that.

In each instance I have been able to get the problems fixed and get the servers back online and working. But I have 3 boxes to do this on which are live servers with customers and wish to minimize the down time as much as possible so any suggestions words of wisdom that you care to share I would like to hear.

Thanks

 

 

 

 

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