rhn-upgrade)rhn-upgrade package, ensure the satellite is registered to RHN and to the Red Hat Network Satellite Channel, then using the package updating tool for your version of Red Hat Enterprise Linux to install the rhn-upgrade package with the following commmand (on Red Hat Enterprise Linux 5 and above):
yum install rhn-upgrade
up2date rh-upgrade
rhn-upgrade and press .
rhn-upgrade package release for the version of Satellite to which you are upgrading.
rpm -Uvh rhn-upgrade-version.rpm