If you get a hosting server of your own, it will run independently, so it will have its own Operating System and you could later install server side applications directly or script-driven internet sites via a hosting Cp. While keeping the Os updated is not always considered a necessity, it can be a rather important task for a number of reasons. A more modern OS version could have better support for certain hardware, so you could get better performance for the internet sites and web apps that you install. Your server will also be more safe because updates often include security patches that deal with small issues which may allow unauthorized individuals to access your content. Last, but not least, current script versions, which are also released for both increased security and for additional features, may require a later version of the Operating System in order to work correctly and with their full capabilities.