Each virtual or dedicated server has its own Operating System and operates independently from the servers of other clients. Updating the OS is often neglected, but doing that could have a wide range of benefits for your internet sites. The most significant reason to employ the most recent version is that patches are usually released to deal with security holes inside the Os code, so if you don't install the updates, you risk people with harmful intentions to take advantage of these holes and to access your content. Operating system updates are also released for enhanced performance of the system in general and for far better compatibility with the hardware available on the market, which can immediately impact the performance of your internet sites. 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 work properly, so keeping the OS up-to-date is always recommended.