If you get a hosting machine of your own, it will work independently, so it'll have its own Os and you could later install server side applications directly or script-driven internet sites through a hosting Cp. Even though keeping the Operating System updated isn't always considered fundamental, it can be a rather important task for a variety of reasons. A newer OS version may have better support for certain hardware, so you may get better performance for the websites and web applications you install. Your server shall also be more secure since updates often include security patches which fix small issues which may enable unauthorized individuals to access your content. Last, but not least, newer script versions, which are also released for both improved security and for additional features, may require a later version of the Operating System in order to work properly and with their 100 % capabilities.