Each virtual or dedicated hosting server has its own Os and works independently from the hosting machines of other clients. Updating the OS is often overlooked, but doing that could have lots of advantages for your internet sites. The most important reason to employ the newest version is that patches are frequently released to repair security holes inside the Operating System code, so if you do not install the updates, you risk individuals with malicious intentions to use these holes and to access your content. OS updates are also released for enhanced performance of the system as a whole and for far better compatibility with the hardware available on the market, which could immediately affect the performance of your internet sites. If the efficiency and the security of your scripts is the reason to update them, you might also discover that their most recent versions require an updated Operating System in order to operate properly, so keeping the OS up-to-date is always wise.