Under root ,
yum clean all
mkdir ~/centos
cd ~/centos/
wget http://mirror.centos.org/centos/5.4/os/i386/RPM-GPG-KEY-CentOS-5
wget http://mirror.centos.org/centos/5.4/os/i386/CentOS/centos-release-5-4.el5.centos.1.i386.rpm
wget http://mirror.centos.org/centos/5.4/os/i386/CentOS/centos-release-notes-5.4-4.i386.rpm
wget http://mirror.centos.org/centos/5.4/os/i386/CentOS/yum-3.2.22-20.el5.centos.noarch.rpm
wget http://mirror.centos.org/centos/5.4/os/i386/CentOS/yum-updatesd-0.9-2.el5.noarch.rpm
rpm –import RPM-GPG-KEY-CentOS-5
rpm -e –nodeps redhat-release
rpm -e yum-rhn-plugin
rpm -Uvh –force *.rpm
yum upgrade
Now you will notice that the RHN messages are gone.
you are done , Now reboot for System
NB : I tried this method and worked for me fine, I have no warranty that will work for you either, please repport any issue in our Forum



Will this work on a Dell Poweredge server with an active RAID?
thx