When you have root-level access to a server, it means that you will have full control of it. In other words, you'll be able set up any server-side application regardless of the changes that it will make to the software environment on your server, and you will be able to both access and change any kind of file, including system files, and change any settings. You can do this by connecting to the server as a root user that has full privileges to do all these things as well as to generate other users, which includes users that also have full privileges. The connection can be established using a web-based graphical interface or a Secure Shell console. For security reasons, it is recommended that you make one more user for your daily work and employ the root user only when you need to modify the server or to set up software which may be needed by some script-driven app that you want to run.