A virtual or a dedicated hosting machine is a standalone machine, that has its own Os and always keeping the latter up-to-date is a crucial, though underestimated task. Not simply can an update improve the overall performance of your internet sites, but it will also save you a lot of troubles in the future. An update could be released for several reasons, the most common being to fix recently found security holes, which may enable third-party people to access and alter the content that you have on the server. You can also see an improved efficiency of your web applications as updates could also be released for better compatibility between the Os and the configuration it operates on in order to get the most out of the hardware. Also, if you keep your programs up-to-date, they might also need a later Operating system version which will have the needed software dependencies and will enable them to work adequately.