The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
Registering an Oracle Linux guest running under Virtual Box
with the Unbreakable Linux Network (ULN) might fail with a
server communication error. The workaround is to run the
following command as root on the guest:
# echo "uuid=`uuidgen -t`" >> /etc/sysconfig/rhn/up2date
You can then run uln_register again. (Bug ID 14696776)