Each and every virtual or dedicated hosting server has its own Operating System and functions independently from the hosting machines of other clients. Updating the OS is usually overlooked, but doing that might have lots of advantages for your sites. The most significant reason to employ the most recent version is that patches are typically released to repair security holes in the Os code, so if you do not install the updates, you risk individuals with harmful intentions to exploit these holes and to gain access to your content. Operating system updates are also released for improved functionality of the system as a whole and for better compatibility with the hardware available on the market, which can directly influence the efficiency of your websites. If the efficiency and the security of your scripts is the reason to update them, you may also know that their latest versions require an updated Os to be able to function properly, thus keeping the OS up-to-date is always recommended.