What will happen if we disable SELinux? Now you can disable SELinux and it shouldn’t break anything. The server will keep on working as normal. But you will have disabled one of the security features. SELinux works well only when configured properly.
Do I really need SELinux? SELinux is better for those who are very familiar with Unix based systems, but AppArmor is another great introduction to MAC. SELinux is a great way to implement security, but it is known for its bugs and disruptive mechanisms. Actual sandboxing is another alternative to protecting your kernel.
Is SELinux worth the trouble? SELinux places new constraints on how files are accessed on Linux systems. As a new security mechanism, it’s a lot to absorb and it adds a good deal of complexity to our systems. Even so, the security that it provides above and beyond what’s been available in the past makes it well worth learning and using.
Is SELinux hard to learn? SELinux is not hard to maintain. The problem is, that few people understand how SELinux works and therefore the ones who don’t, find SELinux hard to maintain. The “complexity” of SELinux gives it a lot of flexibility.