Each and every virtual or dedicated hosting server has its own Operating System and functions independently from the servers of other clients. Updating the Operating system is usually ignored, but doing that could have quite a lot of advantages for your websites. The most essential reason to use the most recent version is that patches are frequently released to deal with security holes inside the Os code, so if you don't install the updates, you risk individuals with harmful intentions to exploit these holes and to access your content. Operating system updates are also released for enhanced performance of the system overall and for much better compatibility with the hardware available on the market, which could instantly influence the efficiency of your sites. If the functionality and the security of your scripts is the reason to update them, you could also discover that their most recent versions require an updated Operating System to be able to operate effectively, therefore keeping the OS up-to-date is always a good idea.