A virtual or a dedicated server is a standalone machine, which has its own Operating System and maintaining the latter up-to-date is a vital, although underrated task. Not only can an update boost the general performance of your sites, but it can also save you a great deal of problems down the road. An update could be released for a variety of reasons, the most prevalent being to fix recently discovered security holes, which may permit third-party individuals to access and change the content which you have on the hosting machine. You might also see an improved overall performance of your web apps because updates might also be released for better compatibility between the Os and the configuration it operates on so that you can get the most out of the hardware. Also, if you keep your applications up-to-date, they could also need a later Operating system version that will have the needed software dependencies and will permit them to work adequately.