[Help] How Would I Create a Minecraft Server?

[hunterbonx]

I know there was a topic about this before but, I have an extra question to ask.
How would I make a new server if I have made one before and I can't delete it?
So. I Have made a server before but turned out really bad, so I decided to make a new one, but, it said the new server was running on the same port as my old one.
It says I must delete the old files in order to make this new one. But I cannot find these old files.
Can someone help me please?

[Michael5017]

Your old server folder can be hidden
And you can portforward another port like 25585 and then change the port to 25585 in the server config

[Kaise123]

Reboot your computer, then run the new server. If that doesn't work, Then you need to make sure that the 'server-ip' field in server.properties is blank.