The software described in this documentation is either no longer supported or is in extended support.
Oracle recommends that you upgrade to a current supported release.

1.4.5 Oracle Linux 5 Does Not Register with Spacewalk after Kickstart Installation

If Oracle Linux 5 does not register with Spacewalk after Kickstart installation, add -up2date and -up2date-gnome to the Kickstart profile on the Software, Package Group screen.