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