Each virtual or dedicated server has its own Os and works independently from the servers of other customers. Updating the OS is usually overlooked, but doing that might have lots of benefits for your websites. The most significant reason to use the latest version is that patches are usually released to repair security holes within the Os code, so if you do not install the updates, you risk individuals with harmful intentions to exploit these holes and to get access to your content. OS updates are also released for enhanced efficiency of the system in general and for much better compatibility with the hardware 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 could also discover that their most recent versions require an updated Os so as to work effectively, therefore keeping the Operating system up-to-date is always wise.