1. Install screen

sudo apt-get install screen

2. Start your minecraft server using screen

# you can use whatever you want for the name, but don't forget the "s!
sudo screen -S "MC Server"

3. Now you can start your server (you can start whatever you want, it'll run until you close the screen "MC Server") If you have a bash script you can start it using this:

./your_minecraft_server_bash.sh

If you don't have a bash script you can start it using this:

sudo java -Xmx512M -Xms512M -jar mcserver.jar

Don't close the ssh yet! 4. Now you can close the screen

Press CTRL + A + D to close it.

now you can close the ssh connection. How to open it again?

sudo screen -r

or

screen -x number.nameofthescreen