Each and every virtual or dedicated hosting server has its own Os and operates independently from the hosting machines of other customers. Updating the OS is frequently overlooked, but doing that may have lots of benefits for your websites. The most significant reason to use the latest version is that patches are usually released to deal with security holes inside the Os code, so if you do not install the updates, you risk people with malicious intentions to use these holes and to gain access to your content. OS updates are also released for enhanced performance of the system as a whole and for better compatibility with the hardware available on the market, which could directly affect the efficiency of your websites. If the performance and the security of your scripts is the reason to update them, you may also know that their latest versions require an updated Operating System to be able to function effectively, thus keeping the OS up-to-date is always wise.