A virtual or a dedicated hosting server is a standalone machine, which has its own Operating System and always keeping the latter up-to-date is a vital, albeit underestimated task. Not only can an update improve the functionality of your websites, but it can also save you lots of problems down the road. An update could be released for several reasons, the most widespread being to fix newly identified security holes, which may permit third-party people to access and modify the content you have on the hosting server. You can also see an improved functionality of your web apps since 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. Additionally, if you keep your applications up-to-date, they may also need a later OS version which will have the required software dependencies and will enable them to operate properly.