A virtual or a dedicated hosting server is a standalone machine, that has its own Os and always keeping the latter up-to-date is a vital, although underrated task. Not simply can an update improve the functionality of your sites, but it could also save you a lot of troubles in the future. An update may be released for a number of reasons, the most common being to fix recently found security holes, which may permit third-party people to access and modify the content that you have on the server. You can also see an improved overall performance of your web apps because updates can also be released for better compatibility between the Os and the configuration it operates on so as to get the most out of the hardware. Moreover, if you keep your applications up-to-date, they could also require a later OS version which will have the necessary software dependencies and will allow them to operate effectively.