I googled for 3 hours, I was told Ctrl+a, D closes a screen but keeps the session live. When I try this, and every other combination of this command, nothing happens. When i type "screen-r" etc nothing happens, it merely enters that syntax into my Minecraft Console.
I am very new to all this, so any educating would be very accepted.
Synopsis: How can I keep my server going, even after I close PuTTY? Thank you in advance.