Each virtual or dedicated server has its own Os and functions separately from the hosting machines of other clients. Updating the Operating system is often ignored, but doing that may have a wide range of benefits for your internet sites. The most important reason to use the newest version is that patches are typically released to fix security holes inside the Operating System code, so if you do not install the updates, you risk individuals with harmful intentions to use these holes and to access your content. Operating system updates are also released for enhanced functionality of the system in general and for better compatibility with the hardware available on the market, which could directly impact the functionality of your internet sites. If the performance and the security of your scripts is the reason to update them, you could also find out that their most recent versions require an updated Os to be able to work properly, so keeping the Operating system up-to-date is always wise.