migrate from redhat 5 to centos 5
sudo su
yum clean all mkdir /usr/src/centos cd /usr/src/centos
wget http://mirror.centos.org/centos/5/os/x86_64/CentOS/centos-release-5-6.el5.centos.1.x86_64.rpm wget http://mirror.centos.org/centos/5/os/x86_64/CentOS/centos-release-notes-5.6-0.x86_64.rpm wget http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-3.2.22-33.el5.centos.noarch.rpm wget http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm wget http://mirror.centos.org/centos/5/os/x86_64/CentOS/yum-updatesd-0.9-2.el5.noarch.rpm
wget http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 rpm --import RPM-GPG-KEY-CentOS-5
/bin/rpm -e --nodeps redhat-release /bin/rpm -e --nodeps rhn-client-tools /bin/rpm -e --nodeps yum-rhn-plugin
(SLIGHTLY FASTER TO BATCH THE COMMANDS TOGETHER) rpm -e --nodeps redhat-release-notes redhat-release yum-rhn-plugin redhat-logos
rpm -Uvh --force *.rpm yum upgrade