Each and every virtual or dedicated hosting machine has its own Os and functions separately from the hosting machines of other customers. Updating the Operating system is frequently ignored, but doing that may have lots of benefits for your sites. The most important reason to employ the most up-to-date version is that patches are frequently released to fix security holes inside the Os code, so if you don't install the updates, you risk people with malicious intentions to use these holes and to access your content. OS updates are also released for improved performance of the system in general and for much better compatibility with the hardware available on the market, which could instantly impact the efficiency of your websites. If the efficiency and the security of your scripts is the reason to update them, you might also know that their latest versions require an updated Os so as to operate effectively, therefore keeping the OS up-to-date is always recommended.