A virtual or a dedicated hosting machine is a standalone machine, that has its own Operating System and always keeping the latter up-to-date is a vital, albeit underrated task. Not only can an update boost the performance of your sites, but it will also save you a lot of problems down the road. An update could be released for many different reasons, the most common being to fix newly identified security holes, which may enable third-party individuals to access and modify the content which you have on the hosting server. You will also see an improved performance of your web applications since updates could also be released for better compatibility between the Operating System and the configuration it operates on as a way to get the most out of the hardware. Furthermore, if you keep your applications up-to-date, they may also need a later OS version that will have the needed software dependencies and will enable them to operate adequately.