Every virtual or dedicated server has its own Operating System and functions separately from the hosting machines of other clients. Updating the OS is often ignored, but doing that may have a wide range of advantages for your internet sites. The most significant reason to use the latest version is that patches are usually released to deal with security holes inside the Os code, so if you do not install the updates, you risk individuals with destructive intentions to exploit these holes and to access your content. Operating system updates are also released for much better performance of the system in general and for better compatibility with the hardware on the market, which could immediately affect the efficiency of your websites. If the efficiency and the security of your scripts is the reason to update them, you might also discover that their newest versions require an updated Operating System to be able to work effectively, therefore keeping the Operating system up-to-date is always recommended.