If you get a hosting server of your own, it will run independently, so it will have its own Os and you could later install server side applications directly or script-driven internet sites through a hosting Cp. Though keeping the Operating System updated isn't always considered a necessity, it can be a quite important task for a number of reasons. A newer OS version could have better support for certain hardware, so you could get better performance for the sites and web applications that you install. Your server will also be more protected as updates usually include security patches which deal with small problems that may enable unauthorized individuals to access your content. Last, but not least, more modern script versions, which are also released for both improved security and for additional features, may need a later version of the Operating System in order to work effectively and with their 100 % capabilities.