Tutorial | Build A Modded Minecraft Server with Forge

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Prerequisites

Before diving in, ensure you have:

  • Ubuntu 24.04 LTS installed and running.

  • Java Development Kit (JDK) 17 installed (Forge for newer Minecraft versions requires Java 17).

  • Basic command-line proficiency.

  • An active internet connection.

 

Step 1: Update, Java and Directory

First things first, let’s make sure your system is up-to-date, Java 17 is installed and a dedicated server directory is created. Just like what you have done a few moments ago.

Step 2: Download, Install and accept EULA of Forge Server

  • Visit the Forge Website:

    Go to the official Minecraft Forge download page.

  • Select the Minecraft Version:

    Choose the version you want to run (e.g., 1.20.1).

  • Download the Installer:

    • Click on the Installer link to get the forge-x.x.x-installer.jar file.

    • Alternatively, use wget to download directly: wget https://maven.minecraftforge.net/net/minecraftforge/forge/1.20.1-xx.xx.x/forge-1.20.1-xx.xx.x-installer.jar -O forge-installer.jar

  • Use the installer to set up Forge:
    java -jar forge-installer.jar

    • This process:

      Downloads the necessary libraries.
      Creates a forge-1.20.1-xx.xx.x.jar file (the Forge server jar).
  • Before launching, agree to Mojang’s EULA

Step 3: Start Up with a Script

  • Create a Startup Script: Let’s make it starting the server easier with a script: nano start.sh
    In the editor, add the following lines:
    #!/bin/bash
    java -Xms4G -Xmx4G -jar forge-1.20.1-xx.xx.x.jar

    • -Xms4G: Sets initial RAM allocation to 4GB.

    • -Xmx4G: Sets maximum RAM allocation to 4GB.

    • Adjust based on your server’s RAM.

  • Make this script executable by chmod +x start.sh.
    After that, you can start your server under current directory using ./start.sh

Step 4: Install Mods

  1. Create the Mods Folder:

    If it’s not already there, use mkdir to create a mods folder: mkdir mods

  2. Add your mods:

    • Ensure mods match your Minecraft and Forge versions.

    • Place the mod .jar files into the mods folder.

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