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 websites through a hosting Cp. Although keeping the Operating System updated isn't always considered a necessity, it can be a rather important task for a number of reasons. A newer OS version may have better support for certain hardware, so you might get better performance for the sites and web apps which you install. Your server will also be more secure because updates often include security patches that take care of small problems which may enable unauthorized individuals to access your content. Last, but not least, more modern script versions, which are also released for both enhanced security and for additional features, might require a later version of the Operating System in order to work effectively and with their 100 % capabilities.