When you have root-level access to a hosting server, this means that you'll have full control over it. That is to say, you'll be able install any server-side application regardless of the changes that it will make to the software environment on your server, and you are able to both access and update any file, which includes system files, and change various settings. This can be done by connecting to the server as a root user that has full privileges to perform all these things as well as to create 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 create a separate user for your everyday work and use the root user only when you need to modify the server or to install software that may be required by a script-driven application that you want to run.