Making money with a dedicated server or with knowledge of linux?

I've been learning a lot about linux and how it runs and works because I wanted to get and Admin my own server, but I ran into a small problem, I don't really need a server.

So I really want to know, what could I do with a dedicated server? I've heard of renting Web Hosting space, cloud service, hosting game servers for games like Minecraft, and even Mumble servers, but I would like something some-what profitable. I know that there has to be something that can be profitable out there I could do, any suggestions?

Added (1). I think I need to add on to what I've said as someone thinks that I would actually host a server on my home internet connection.

I didn't just "install linux" I learned the command line OS of CentOS, (which is basically like using SSH on a headless server) as well as the commands used to run it, and how it works as a server and basic Admin skills. I also would be renting out a server from a data center if I was going to do this. I came here to figure out my "business plan" and where to start, not to hear about how I do not have "financial backing" which I do. Finally, if you think that you can't make money with a dedicated linux server then you are mistaken, a large amount of servers run linux as it is more efficient and a free OS.

You would need a very fast and very stable internet connection to do that. And you would need a very stable server with redundancy. And you would need to know a LOT more about running a server then you do now before you could even begin to get people to pay you to host their stuff.

You ain't no data center. You don't have a business plan. You don't have financial backing. You aren't going to make money with a dedicated linux server.

I'm not trying to be mean, but there's a big difference between having a computer running linux and knowing a bit about linux, and making money hosting stuff.

Well, if you really would like to be profitable from a server, two options available: host a successful website and sell products on it. OR you can rent server space directly to people. You need to do lots of marketing work in order to be successful…