Every virtual or dedicated hosting machine has its own Operating System and operates separately from the hosting servers of other customers. Updating the OS is frequently overlooked, but doing that might have a wide range of benefits for your sites. The most essential reason to use the most recent version is that patches are frequently released to fix security holes in the Os code, so if you do not install the updates, you risk people with destructive intentions to take advantage of these holes and to gain access to your content. Operating system updates are also released for improved efficiency of the system overall and for better compatibility with the hardware on the market, which can instantly impact the efficiency of your internet sites. If the efficiency and the security of your scripts is the reason to update them, you could also find out that their most up-to-date versions require an updated Operating System in order to operate effectively, therefore keeping the OS up-to-date is always recommended.