Each and every virtual or dedicated server has its own Os and works independently from the hosting servers of other clients. Updating the Operating system is frequently neglected, but doing that could have quite a lot of advantages for your websites. The most significant reason to use the most up-to-date version is that patches are usually released to fix security holes within the Operating System code, so if you don't install the updates, you risk individuals with malicious intentions to use these holes and to get access to your content. Operating system updates are also released for enhanced efficiency of the system overall and for better compatibility with the hardware available on the market, which could directly influence the efficiency of your internet sites. If the efficiency and the security of your scripts is the reason to update them, you could also find out that their most recent versions require an updated Os to be able to operate properly, so keeping the Operating system up-to-date is always a wise idea.