How do I actually INSTALL the server on Ubuntu Server?

Hello, I’m new to this and haven’t been able to load the server. Everything I try, such as github links, say that the files don’t exist.

You need git: Git - Installing Git

After that follow the guideline here:

Now, if this is in not what you problem was, you need to provide us with some error logs, or actual error messages, as your request is somewhat vague around the details