Each and every virtual or dedicated hosting server has its own Os and works independently from the hosting machines of other customers. Updating the OS is often overlooked, but doing that may have quite a lot of advantages for your websites. The most important reason to use the newest version is that patches are frequently released to fix security holes within the Operating System code, so if you don't install the updates, you risk individuals with harmful intentions to take advantage of these holes and to access your content. OS updates are also released for much better efficiency of the system as a whole and for better compatibility with the hardware on the market, which can immediately influence the efficiency of your internet sites. If the functionality and the security of your scripts is the reason to update them, you might also discover that their newest versions require an updated Os to be able to work properly, so keeping the Operating system up-to-date is always a wise idea.