Zampto (DBA)
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How-To, Software, Learn
2025-12-16 19:04:42
ID: 26

How to Change Your Minecraft Java Server Version

BEFORE PROCEEDING, BACK UP YOUR SERVER FILES TO YOUR DEVICE! ZAMPTO.NET is not responsible for any data loss.

Youtube video: https://www.youtube.com/watch?v=8Zwfd8dOxh0

You can change the version of your Minecraft Java server in two different ways:

πŸ”Ή Method 1 β€” The Easiest: Using the Software Manager (File Manager)

  1. Open the Web File Manager for your Minecraft Java server.

  2. If your server supports the feature, on a computer you should see a button called Software (usually next to the Upload button).

    Software Button

  3. Click the Software button and choose the server type you want: Minecraft Vanilla, Spigot, Paper, Fabric, and others.

    Software Selection

  4. Once the Software Manager/Selector opens, select the version and, if required, the build.

    Version Selector

  5. To only change the JAR without deleting your files, make sure you enable: β€œNo Bulk-Delete β€” Skip removing existing files”

    Always take a backup first (preferably downloaded to your own device).

    Skip Delete

  6. Click Install and wait for the installation to finish.

    Installing

  7. Once completed, return to your Console and start your server. It should now use the new server JAR.

    Startup

πŸ”Ή Method 2 β€” Manual Installation

This method is recommended if: βœ” Your server type is not in the Software Installer βœ” You prefer full manual control

Steps:

  1. Download the server JAR you want on your device.

  2. Upload it to / or /home/container/ using the File Manager or SFTP.

  3. Go to your server Startup page in the panel.

  4. Update the Docker Image to the correct Java version needed by your server.

  5. Update the Server JAR Name field so it matches the JAR you uploaded.

  6. Start your server and check if everything works correctly.

πŸ›  Common Issues & How to Fix Them

❌ 1. Wrong Java Version

Some Minecraft versions require specific Java releases.\ Example: Minecraft 1.21.4 does not support Java 8, but requires Java 21.

βœ” Go to Startup β†’ Change Docker Image to the correct Java version.

❌ 2. EULA Not Accepted (eula.txt error)

Minecraft Java servers must have the EULA accepted to start.

If not, you may see errors like:

[Server thread/WARN]: Failed to load eula.txt
[Server thread/INFO]: You need to agree to the EULA in order to run the server.
[Server Shutdown Thread/INFO]: Stopping server

βœ” How to Fix

  1. Open eula.txt in your File Manager

  2. Change this line:

eula=false

To:

eula=true

Save β†’ Restart your server πŸŽ‰