Each virtual or dedicated hosting server has its own Os and operates independently from the hosting machines of other clients. Updating the Operating system is frequently neglected, but doing that might have lots of advantages for your internet sites. The most important reason to employ the most recent version is that patches are usually released to deal with security holes within the Os code, so if you don't install the updates, you risk individuals with harmful intentions to exploit these holes and to gain access to your content. Operating system updates are also released for improved efficiency of the system overall and for much better compatibility with the hardware available on the market, which can instantly influence the functionality 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 Operating System in order to work properly, thus keeping the Operating system up-to-date is always recommended.