OS implements some security functions for general objects such as access control audit and virtualization What is control What is the purpose of it How can we use audit to help protect the system

Access control is a security function implemented by OS to limit access to resources such as files, directories, and network services based on user identity and authorization level. The purpose of access control is to prevent unauthorized access to critical resources and protect them from malicious activities such as theft, tampering, and destruction.

Audit is another security function implemented by OS to monitor and record system activities, including user actions, file access, network traffic, and system configuration changes. The purpose of audit is to detect security breaches, investigate security incidents, and comply with regulatory requirements.

We can use audit to help protect the system by setting up auditing policies that define what events should be monitored and recorded, and configuring log management tools to analyze audit logs and generate alerts when suspicious activities are detected. By regularly reviewing audit logs and addressing security issues, we can identify and mitigate potential security threats before they cause damage to the system