Each virtual or dedicated server has its own Os and functions separately from the hosting machines of other customers. Updating the OS is usually neglected, but doing that might have lots of advantages for your websites. The most essential reason to employ the latest version is that patches are frequently released to deal with security holes in the Operating System code, so if you don't install the updates, you risk individuals with destructive 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 far better compatibility with the hardware available on the market, which could immediately influence the efficiency of your sites. If the performance and the security of your scripts is the reason to update them, you could also find out that their latest versions require an updated Os in order to work effectively, so keeping the Operating system up-to-date is always recommended.