About patch baselines

The topics in this section provide information about how patch baselines work in Patch Manager, a capability of AWS Systems Manager, when you run a Scan or Install operation on your instances.

The information in the following topics applies both when you're patching instances on a schedule and patching instances on demand.

Topics

• About predefined and custom patch baselines
• About package name formats for approved and rejected patch lists
• About patch groups
• About patching applications released by Microsoft on Windows Server