Each virtual or dedicated hosting machine has its own Os and operates separately from the servers of other customers. Updating the Operating system is usually neglected, but doing that may have quite a lot of benefits for your websites. The most significant reason to employ the most up-to-date version is that patches are usually released to repair security holes within the Operating System code, so if you do not install the updates, you risk individuals with malicious intentions to exploit these holes and to access your content. OS updates are also released for enhanced functionality of the system overall and for better compatibility with the hardware on the market, which could directly impact the efficiency of your sites. If the efficiency and the security of your scripts is the reason to update them, you may also know that their most up-to-date versions require an updated Os to be able to operate effectively, thus keeping the OS up-to-date is always a good idea.