Each and every virtual or dedicated hosting machine has its own Operating System and functions separately from the hosting servers of other clients. Updating the OS is often overlooked, but doing that might have lots of advantages for your sites. The most essential reason to use the most recent version is that patches are typically released to deal with security holes within the Os code, so if you do not install the updates, you risk people with harmful intentions to use 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 available on the market, which can instantly influence the functionality of your websites. If the efficiency and the security of your scripts is the reason to update them, you could also find out that their most recent versions require an updated Operating System so as to function effectively, consequently keeping the OS up-to-date is always a wise idea.