A virtual or a dedicated hosting server is a standalone machine, which has its own Os and always keeping the latter up-to-date is an important, though underrated task. Not simply can an update boost the functionality of your sites, but it can also save you a great deal of issues down the road. An update could be released for several reasons, the most prevalent being to fix recently found security holes, which may allow third-party individuals to access and modify the content you have on the server. You can also see an improved functionality of your web apps because updates could also be released for better compatibility between the Operating System and the configuration it works on so as to get the most out of the hardware. Also, if you keep your apps up-to-date, they may also require a later Operating system version that will have the needed software dependencies and will permit them to work adequately.