Each and every virtual or dedicated server has its own Operating System and functions separately from the hosting machines of other clients. Updating the Operating system is often overlooked, but doing that might have a wide range of benefits for your websites. The most essential reason to use the most up-to-date version is that patches are frequently released to fix security holes inside the Os code, so if you don't 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 much better performance of the system overall and for 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 might also find out that their most up-to-date versions require an updated Os in order to work effectively, therefore keeping the Operating system up-to-date is always recommended.