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The following guide describes how to install Minecraft server on a Debian System 10.
We will do the whole thing through the console by entering a few simple commands.

First, we update the system and packages:

sudo apt update

sudo apt upgrade 

The next step is to install Java

sudo apt install default-jre

We can check the java version by issuing the command:

java -version

We add a System User named Minercrat:

sudo adduser minecraft

We add sudo group to him:

sudo usermod -aG sudo minecraft

We install Screen so that our server can run in the background:

sudo apt install screen -y

We create the game server folder and go to it:

mkdir minecraft

cd minecraft

We download the minecraft server

wget https://launcher.mojang.com/v1/objects/a16d67e5807f57fc4e550299cf20226194497dc2/server.jar

We create a script so that our minecrat server starts by itself in the event of a server restart.
For this purpose, we create the start.sh file:

sudo nano start.sh

We paste into it:

java -Xms1024M -Xmx2560M -jar server.jar nogui

We give permission:

sudo chmod +x start.sh

We are updating packages again:

sudo apt update

We can now start the Minecraft server with the command:

./start.sh

At the first run, we should accept the license. The script will guide us what to do.

The next step is to open eula.txt and set eula = true. This will allow your server to connect to the Minecraft client software. Open this file in your preferred editor and make sure, that sounds: eula=true.

sudo nano eula.txt

eula=true

We add our game server to run in the background:

screen /home/minecraft/run.sh

The last step is to add the port to the firewall

sudo ufw allow 25565