Each virtual or dedicated hosting machine has its own Os and works separately from the hosting machines of other customers. Updating the Operating system is often overlooked, but doing that may have quite a lot of benefits for your internet sites. The most important reason to employ the newest version is that patches are usually released to deal with security holes in the Os code, so if you don't install the updates, you risk people with harmful intentions to use these holes and to access your content. OS updates are also released for enhanced performance of the system overall and for much better compatibility with the hardware available on the market, which could instantly impact the performance of your sites. If the functionality and the security of your scripts is the reason to update them, you may also discover that their most up-to-date versions require an updated Os in order to operate effectively, therefore keeping the Operating system up-to-date is always a good idea.