If you get a hosting machine of your own, it will run independently, so it'll have its own Operating System and you'll be able to 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 quite important task for a number of reasons. A more modern 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 will also be more secure because updates typically include security patches that fix small problems which may enable unauthorized people to access your content. Last, but not least, more recent script versions, which are also released for both improved security and for additional features, may need a later version of the Os in order to work effectively and with their full capabilities.