Question?

and I thought about having a public minecraft server, but first I wanted to know a couple of things like:
How much minimum ram is needed for a minecraft to work well?
How much minimum CPU is minecraft?
How much minimum internet does minecraft require?
What operating system do you recommend to host a minecraft server?
Anyway it would be good to help me: D

nice aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa