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.
Before you register a system with Spacewalk, you should create an activation key for use with client systems, as described in Chapter 3, Creating Activation Keys. It is possible to register a system without an activation key by providing a user name and password instead but Spacewalk does not perform channel subscription nor package installation in this case. Oracle recommends using an activation key that is specific to the Oracle Linux release and system architecture rather than a default activation key.
Spacewalk registration is usually performed by Spacewalk's provisioning service. For existing or manually installed systems, you can alternatively use the rhnreg_ks command to register the system with Spacewalk.
Do not register a Spacewalk server or client with ULN. You can register a Spacewalk server as a client of itself to receive updates.