If you get a hosting machine of your own, it will operate independently, so it will have its own Os and you can later install server side applications directly or script-driven internet sites via a hosting Control Panel. Although keeping the Os updated is not always considered fundamental, it can be a quite important task for a variety of reasons. A newer OS version might have better support for specific hardware, so you might get better performance for the sites and web apps which you install. Your server will also be more protected because updates normally include security patches which fix small problems that may enable unauthorized individuals to access your content. Last, but not least, more recent script versions, which are also released for both increased security and for additional features, might require a later version of the Os in order to work correctly and with their 100 % capabilities.