Every virtual or dedicated hosting server has its own Operating System and works separately from the hosting machines of other customers. Updating the Operating system is usually ignored, but doing that might have quite a lot of advantages for your websites. The most significant reason to use the most recent version is that patches are typically released to repair security holes in the Os code, so if you do not install the updates, you risk people with harmful intentions to take advantage of these holes and to get access to your content. OS updates are also released for enhanced 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 recent versions require an updated Os so as to work effectively, consequently keeping the Operating system up-to-date is always wise.