Every virtual or dedicated server has its own Operating System and works separately from the hosting machines of other clients. Updating the Operating system is usually ignored, but doing that could have quite a lot of advantages for your internet sites. The most essential reason to use the latest version is that patches are frequently released to deal with security holes inside the Operating System code, so if you don't install the updates, you risk individuals with harmful intentions to use these holes and to gain access to your content. OS updates are also released for enhanced efficiency of the system overall and for far better compatibility with the hardware on the market, which can immediately impact the functionality of your internet sites. If the functionality and the security of your scripts is the reason to update them, you might also discover that their newest versions require an updated Os to be able to work properly, so keeping the OS up-to-date is always recommended.