Every virtual or dedicated hosting server has its own Os and operates independently from the hosting servers of other clients. Updating the Operating system is often ignored, but doing that could have quite a lot of benefits for your internet sites. The most essential reason to employ the latest version is that patches are frequently released to deal with security holes inside the Os code, so if you don't install the updates, you risk people with destructive intentions to use these holes and to get access to your content. OS updates are also released for much better functionality of the system as a whole and for far better compatibility with the hardware on the market, which could directly impact the performance of your websites. If the performance and the security of your scripts is the reason to update them, you may also discover that their most recent versions require an updated Os in order to function properly, therefore keeping the OS up-to-date is always recommended.