The answer to this question largely depends on two factors. Are you new to server technology and not very interested? In this case, Windows is the easiest option to get where you want to go. Do you already have experience with Linux or would you like to familiarize yourself with this operating system? If so, Linux gives you more freedoms to configure your server, and you will be using an operating system that is less vulnerable to attacks from the Internet. Linux is also open source and therefore free.
There are many uses for a dedicated server: big data, machine learning, website and application hosting, backups and storage, infrastructure virtualisation, server clusters, business applications (CRM, ERP), and even online game hosting. This is why we offer several different dedicated server ranges, each of which are designed for a specific set of needs. Our sales and support teams will help you with your project, and can offer expert advice on which server to choose.