Each virtual or dedicated server has its own Operating System and works independently from the hosting servers of other customers. Updating the OS is usually overlooked, but doing that might have lots of advantages for your internet sites. The most significant reason to employ the latest version is that patches are usually released to repair security holes within the Operating System code, so if you don't install the updates, you risk people with harmful intentions to exploit these holes and to gain access to your content. Operating system updates are also released for much better performance of the system in general and for much better compatibility with the hardware on the market, which could instantly affect 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 most recent versions require an updated Operating System to be able to operate effectively, so keeping the Operating system up-to-date is always recommended.