I have a RHEL system and I'm thinking of changing to CentOW. How can this be done most easily. It is important that the e-mail setup not be disturbed, since it was crafted to work with an IP that requires authentication.
I switch a RHEL machine in EL6 to scientific linux a while ago, and I suppose it's the exact same thing for Centos.
Note this applies to my x64 machine, if you're in i686, you'll just have to change the distrio/package name.
Here's what I did :
1. Harvest the sl-release-6.0-6.0.1.x86_64.rpm and redhat-logos-60.0.14-1.sl6.1.noarch.rpm from the repository.
2. Remove unneeded packages :
rpm -e rhnlib rhn-client-tools rhn-setup yum-rhn-plugin rhn-check rhnsd redhat-indexhtml redhat-lsb
Remove old packages and replice it with the one you downloaded :
rpm -e --nodeps redhat-release-server-6Server rpm -hiv sl-release-6.0-6.0.1.x86_64.rpm
rpm -e --nodeps redhat-logos rpm -hiv redhat-logos-60.0.14-1.sl6.1.noarch.rpm