Chapter 20. Upgrading Your OS From CentOS 6.6 to RHEL 6.6

Update your OS to ensure it runs the latest kernel available. Execute:

sudo yum update
sudo reboot

Install packages that will be required by various Red Hat Network tools:

sudo yum install dbus-python libxml2-python m2crypto pyOpenSSL python-dmidecode python-ethtool python-gudev usermode

Create a rhel directory:

sudo mkdir /rhel

Use the Filter text box on the right hand side, search for and download the latest version of the following packages for RHEL 6.6 x86_64 in your rhel directory:

Install the Red Hat GnuPG signing key:

cd /rhel
sudo wget https://www.redhat.com/security/fd431d51.txt
sudo rpm --import fd431d51.txt

Forcibly remove the package that identifies the current system as CentOS:

sudo rpm -e --nodeps centos-release

Forcibly upgrade to the downloaded RHEL and RHN packages:

sudo rpm -Uhv --force *.rpm
sudo rpm -e yum-plugin-fastestmirror
sudo yum clean all

Register the system with Red Hat Network:

sudo rhn_register

Update your system with the new yum repository:

sudo yum update