If you get a hosting server of your own, it will operate independently, so it will have its own Operating System and you can later install server side apps directly or script-driven sites via a hosting Control Panel. Even though keeping the Operating System updated isn't always considered a necessity, it can be a very important task for a variety of reasons. A more modern Operating system version may have better support for specific hardware, so you might get better performance for the internet sites and web applications you install. Your server will also be more protected because updates usually include security patches that deal with small issues which may enable unauthorized individuals to access your content. Last, but not least, current script versions, which are also released for both enhanced security and for additional features, may require a later version of the Operating System in order to work correctly and with their full capabilities.