If you get a hosting machine 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 internet sites through a hosting Control Panel. Even though keeping the Os updated is not always considered a necessity, it can be a really important task for a number of reasons. A newer Operating system version might have better support for specific hardware, so you might get better performance for the websites and web applications that you install. Your server shall also be more safe since updates normally include security patches that take care of small problems that 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, might require a later version of the Os in order to work properly and with their full capabilities.