Which AWS service automates the traditional maintenance job of running timely assessments and checking for OS vulnerabilities?

The AWS service that automates the traditional maintenance job of running timely assessments and checking for OS vulnerabilities is AWS Inspector.

Here are the steps on how AWS Inspector works:

1. Define the scope of the assessment: You can specify the Amazon EC2 instances that you want to include in your assessment.

2. Choose the rules packages: AWS Inspector provides a variety of rules packages that you can choose from. These rules packages contain rules for common best practices, security vulnerabilities, and compliance standards.

3. Run the assessment: AWS Inspector will then run the assessment based on the scope and rules packages that you have defined. It will check for any vulnerabilities or deviations from best practices.

4. Review the findings: After the assessment is complete, AWS Inspector will provide a detailed report of its findings. You can review these findings to understand any potential security risks.

5. Take action: Based on the findings, you can take appropriate action to mitigate any risks. This could involve patching software, changing configurations, or updating security groups.