Before we start, make sure that: you have an UBUNTU terminal ready;debian will not work; your PC is connected to the internet; you have at least 10GB free disk space.

So, let's start!

Step 1: Installing Java

Run these commands ONE BY ONE. DO NOT PRESS CTRL+C. Ignore the lines that start with # .

sudo apt update
sudo apt install -y libc6-x32 libc6-i386
wget https://download.oracle.com/java/18/latest/jdk-18_linux-x64_bin.deb --no-check-certificate
sudo dpkg -i jdk-18_linux-x64_bin.deb
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1
verify installation (optional)
java -version

Java installation is finished. Now we can download the Minecraft server.jar file.

Run these commands one by one.

mkdir MinecraftServer

wget https://piston-data.mojang.com/v1/objects/f69c284232d7c7580bd89a5a4931c3581eae1378/server.jar --no-check-certificate

Now, you could say we're done. But, there's still something to do, so people from another network can join your server.

This is what you should see in your terminal:

So let's fix that.

Run this command:

nano eula.txt

Use the arrow keys to move your cursor.

Change eula=false to eula=true

Then, press ctrl+x , y and enter.

Then, try starting your server again:

java -Xmx1024M -Xms1024M -jar server.jar nogui

This time, the server should start.

Type "stop" or press ctrl+C to stop the server.

Setting up playit (ngrok, but with a permanent address)

Click here. Once in the website, create an account like you normally would in any other website.

Once you're logged in, on the right, click "Add Tunnel".

In your terminal, type "ifconfig | grep "inet " | grep -Fv 127.0.0.1 | awk '{print $2}'" to find your computer's IP address.

After running that command, you should see 2 lines in the terminal. The second one is your server's IP.

In the playit website, once you clicked add tunnel, select "custom" for tunnel type, and click next.

For local IPv4, enter your server's IP.

For local port, put 25565.

Port type, select TCP. Port count = 1.

Click create tunnel. You can enter a name if you want to, but you don't have to. Click the X on the top right of the blue "header".

Now, you need to install playit on your server. Run these commands:

# For Debian & Ubuntu based systems
    curl -SsL https://playit-cloud.github.io/ppa/key.gpg | sudo apt-key add -
    sudo curl -SsL -o /etc/apt/sources.list.d/playit-cloud.list https://playit-cloud.github.io/ppa/playit-cloud.list
    sudo apt update
    sudo apt install playit

After you finish running the commands, type playit into your terminal. If you did everything correctly, you should see this:

Open the link next to where it says "Visit web page", and click "Allow" in the website that opens up.

Now to actually get the IP you will use for the server - after clicking allow, click here.

You should see something like this:

Under "Tunnels", you should see the tunnel you just created. Next to the tunnel name, you should see "addr:". Next to that is your permanent address which you and everyone else will use to connect to your server.

Select it and press ctrl+c to copy it. Then, you can send it to your friends. Almost done, just 1 more thing before we're ready!

Open another terminal window, and run these commands: (If you're using Ubuntu Server as the main OS, press Alt+F2 to open another window. To go back to the previous one, press Alt+F1. --- If you're on WSL, simply open another cmd window and type ubuntu. That's the same thing as opening a new terminal window.)

cd
cd MinecraftServer
java -Xmx1024M -Xms1024M -jar server.jar nogui

Warning: You will have to keep playit open in order for the address to work. Type " playit " in another terminal window and just leave it. Start the server in another window.

Tip: You can mess around with the numbers in -Xmx1024M and -Xms1024M. That's the amount of RAM your server can use (In MB. 1GB = 1000MB. For example, if your server has 8GB RAM installed, you have to leave at least 2GB for the OS itself to run. The rest can go for the server. For example, our server has 5GB RAM installed. Since the main OS is Ubuntu Server, it doesn't require too much RAM to run, so we allocated 4GB RAM to the Minecraft Server.)