Process of OS Security Hardening - Red Hat Enterprise Linux

Operating system security hardening is essential to mitigating cyber threats, particularly in enterprise and critical infrastructure environments. This paper explores the systematic process of security hardening in Red Hat Enterprise Linux (RHEL), focusing on key components such as access control, kernel-level security, compliance frameworks, and automated threat detection. It examines practical implementation strategies, including SELinux enforcement, network segmentation, and continuous monitoring, ensuring resilience against unauthorized access and system exploitation. Additionally, a case study on securing a power grid control system highlights real-world applications of RHEL hardening measures. By adopting a layered security approach, organizations can enhance system integrity, minimize attack surfaces, and ensure compliance with industry standards.