SELinux is known as Security-enhanced Linux. In today’s world data is everything, Protecting your server and keep is up to server is a major challenge. Linux kernel gives security option of SELinux which is designed to protect the server from misconfigurations and unauthorized data access/modification. It helps in defining policy for accessing programs and files. SELinux comes with 3 modes Enforcing, Permissive and Disabled. Enforcing mode: Default mode to enforce the policies on the system, restrict access and log actions. Permissive mode: Here, SELinux was enabled but does not enforce security policies. This result warning and logging for any restricted access. Disabled mode: When SELinux is turned off and the security policies do not protect the server.