Each and every virtual or dedicated hosting server has its own Operating System and operates independently from the hosting machines of other customers. Updating the Operating system is often ignored, but doing that may have quite a lot of advantages for your sites. The most essential reason to employ the newest version is that patches are usually released to repair security holes in the Os code, so if you do not install the updates, you risk people with malicious intentions to exploit these holes and to gain access to your content. OS updates are also released for improved efficiency of the system overall and for better compatibility with the hardware on the market, which can instantly affect the functionality of your websites. If the efficiency and the security of your scripts is the reason to update them, you may also discover that their latest versions require an updated Os in order to work properly, thus keeping the Operating system up-to-date is always a good idea.