Description of problem:
Under step 8: On the Red Hat Enterprise Linux 6 system. Edit the Red Hat Enterprise Linux 6 IdM server so that it no longer issues CRLs.
Substep 3: Reconfigure the original master CA to retrieve renewed certificates from a new master CA.
systemmctl is referenced for restarting services, this section is supposed to be for a RHEL 6 system where systemctl does not exist, commands should be changed to use service.
Thanks for the report! I am moving it to the documentation guide component so that it can be processed.