Each and every virtual or dedicated server has its own Operating System and functions independently from the servers of other customers. Updating the Operating system is usually overlooked, but doing that could have lots of benefits for your sites. The most significant reason to use the newest version is that patches are frequently released to repair security holes in the Operating System code, so if you do not install the updates, you risk people with malicious intentions to take advantage of these holes and to access your content. Operating system updates are also released for enhanced performance of the system in general and for much better compatibility with the hardware available on the market, which could immediately influence the performance of your websites. If the functionality and the security of your scripts is the reason to update them, you may also discover that their latest versions require an updated Operating System to be able to operate properly, so keeping the OS up-to-date is always recommended.