Before your OES 2018 SP3 servers are patched, ensure that you complete the following steps.
If you plan to schedule immediate patching in section Troubleshooting Linux Package Management, perform the steps now.
If you plan to schedule the patch to happen later, you can perform the steps later. Ensure that they are completed before the patching process begins.
On any servers that have the ZENworks Agent installed for the first time, check whether the OES 2018 SP3 installation sources are listed in YaST Control Center> Installation Source. If the sources are not listed, add them back before starting the patching.