Every PC or server is run by an Operating System - the low-level program that interacts with the hardware, including peripheral devices such as a mouse or a printer, and any apps that are installed on your system. Any program input using a command line or a Graphical User Interface (GUI) is processed by sending an Application Program Interface (API) request to the OS. On a server, every single app runs within the parameters defined by the OS as well - priority, physical memory, processing time, etc. This is valid for both standard website scripts and server-side software like a media server. In case a virtual server is created on a physical one, there can be two separate Operating Systems, called guest OS and host OS, so you can set up a different software environment on the very same machine.
Multiple OS in Dedicated Servers
The dedicated servers that we offer come with three different Operating Systems because we want to give you more versatile packages which will enable you to install and run any web software irrespective of its system requirements. Your choices are CentOS, Debian and Ubuntu and these 3 OSs are some of the most reliable and safe ones, not mentioning that they don't have any license costs. All three have thousands of developers that have created a huge number of software packages that you could install and use on your web hosting server. We also offer three internet hosting Control Panels and which one you can use will depend on the Operating System that you select when you sign up. In case you need a new OS later, it won't be a problem because we can always reinstall your server. With our Managed Services package we could also keep your OS secure by updating it every week with any patches which are released for it.