Convert from RHEL to CentOS

Ensure you have Internet connectivity

yum clean all

mkdir ~/centos && cd ~/centos/

root@rhel-gpfs # rpm -e subscription-manager-firstboot-1.9.11-1.el6.x86_64

root@rhel-gpfs # rpm -e subscription-manager-gui-1.9.11-1.el6.x86_64

root@rhel-gpfs # rpm -e subscription-manager

wget http://mirror.centos.org/centos/6.5/os/x86_64/RPM-GPG-KEY-CentOS-6

wget http://mirror.centos.org/centos/6.5/os/x86_64/Packages/centos-release-6-5.el6.centos.11.1.x86_64.rpm

wget http://mirror.centos.org/centos/6.5/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm

wget http://mirror.centos.org/centos/6.5/os/x86_64/Packages/yum-utils-1.1.30-14.el6.noarch.rpm

wget http://mirror.centos.org/centos/6.5/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

 rpm --import RPM-GPG-KEY-CentOS-6

rpm -e --nodeps redhat-release-server

 rpm -e yum-rhn-plugin rhn-setup rhn-check rhn-setup-gnome rhnsd

rpm -Uhv --force *.rpm

yum upgrade

init 6