Each and every virtual or dedicated server has its own Os and works independently from the hosting servers of other clients. Updating the Operating system is frequently neglected, but doing that could have a wide range of benefits for your sites. The most essential reason to employ the most up-to-date version is that patches are typically released to repair security holes within the Os code, so if you don't install the updates, you risk people with malicious intentions to take advantage of these holes and to access your content. OS updates are also released for much better performance of the system in general and for better compatibility with the hardware on the market, which can instantly influence the performance of your websites. If the efficiency and the security of your scripts is the reason to update them, you could also know that their latest versions require an updated Operating System to be able to operate effectively, consequently keeping the Operating system up-to-date is always recommended.