Each virtual or dedicated server has its own Operating System and works separately from the hosting servers of other customers. Updating the Operating system is frequently neglected, but doing that could have lots of advantages for your sites. The most important reason to use the most up-to-date version is that patches are frequently released to fix security holes within the Operating System code, so if you do not install the updates, you risk people 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 much better compatibility with the hardware available on the market, which could immediately influence the functionality of your websites. If the efficiency and the security of your scripts is the reason to update them, you may also find out that their most up-to-date versions require an updated Os to be able to operate effectively, consequently keeping the Operating system up-to-date is always wise.