Each and every virtual or dedicated hosting machine has its own Operating System and functions independently from the hosting servers of other customers. Updating the OS is usually overlooked, but doing that may have lots of advantages for your websites. The most important reason to use the latest version is that patches are typically released to deal with security holes within the Os code, so if you do not install the updates, you risk individuals with harmful intentions to use these holes and to access your content. OS updates are also released for improved functionality of the system in general and for better compatibility with the hardware on the market, which can immediately impact the functionality of your sites. If the performance and the security of your scripts is the reason to update them, you could also discover that their most up-to-date versions require an updated Operating System in order to work effectively, thus keeping the Operating system up-to-date is always a good idea.