Hi,
You don’t want to wait for Centos 6.1 or your RedHat 6 entitlement is running out? This howto is about moving to ScienticLinux.
1a.) (for RHEL) rpm -e redhat-release-server redhat-indexhtml yum-rhn-plugin –nodeps
1b.) (fpr Centos) rpm -e centos-indexhtml centos-release –nodeps
2.) wget http://ftp.scientificlinux.org/linux/scientific/6.1/x86_64/os/Packages/sl-release-6.1-2.x86_64.rpm http://ftp.scientificlinux.org/linux/scientific/6.1/x86_64/os/Packages/sl-indexhtml-6-2.sl6.5.noarch.rpm
3.) rpm -Uvh sl-release-6.1-2.x86_64.rpm sl-indexhtml-6-2.sl6.5.noarch.rpm
4.) check /etc/yum.repos.d/* it points to the right directory and no
4.) yum distribution-synchronization
5a.) rpm -qa –queryformat %{NAME}\ %{VENDOR}\\n | grep “Red Hat, Inc.” | sed -e ‘s: .*::’ | xargs yum reinstall -y
5b) rpm -qa –queryformat %{NAME}\ %{VENDOR}\\n | grep “CentOS” | sed -e ‘s: .*::’ | xargs yum reinstall -y
6.) check packages that are not available in ScientificLinux with “package-cleanup –orphan”
7.) check of all dependencies are still satisfied: “package-cleanup –problems”
8.) If you like install yum-autoupdate