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GTNH is a large Minecraft 1.7.10 Forge modpack. The client and server must use the exact same GTNH version, and the Java requirement depends on the server archive you download.
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Choose a hosting method
There is no single best hosting model. The right choice depends on whether you value convenience, control, or the ability to move the server between machines.
| Method | Best for | What you manage | Main trade-off |
|---|---|---|---|
| Managed hosting | Players who want a server online quickly | Version selection, player access and in-panel settings | You pay a recurring fee and have less control over the operating system |
| Self-hosted computer | A household or community with a suitable always-on machine | Java, files, memory, updates, backups and network access | Your hardware, power and connection become part of the server’s reliability |
| VPS | Administrators who want Linux control without maintaining physical hardware | The complete operating-system and server stack | You must choose enough CPU, RAM and storage, and administer the VPS |
| Docker | Operators who already use containers | Container configuration, volumes, updates and backups | Container mistakes can hide the underlying Java or file-layout problem |
Managed hosting
Many game-hosting panels provide a one-click “GT New Horizons” installer. This is the quickest route when you do not want to install Java, tune a start command or maintain the operating system. Select the GTNH package in the installer, choose the exact release, assign the available memory, accept the EULA when prompted, and start the instance.
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Panel interfaces change. A tutorial written before a provider added or changed its one-click installer may show controls that no longer exist, so use the labels in your current panel. Confirm the selected GTNH version before starting; a convenient installer does not remove the client/server version requirement.
Self-hosting or using a VPS
Self-hosting gives you direct access to every file and setting. A VPS provides a similar Linux workflow while keeping the machine in a data centre. Both paths require you to select Java correctly, reserve enough memory and storage, keep the server process running, and make backups.
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The docker-minecraft-server image supports GTNH with TYPE=GTNH from version 2025.12.0. When updating a container, use the Java 17–2x GTNH build recommended by the GTNH guidance for containers, and keep the world and configuration in persistent volumes rather than only inside a disposable container layer.
Check the release, Java and hardware before downloading
Match the server archive to Java
GTNH server archives are not interchangeable. A Java mismatch can prevent the server from starting even when the files themselves are intact.
| Archive or release information | Runtime guidance | Important qualification |
|---|---|---|
Archive ending in _Server.zip |
Java 8 | Use this legacy build only with a Java 8 runtime. |
Archive labelled _Server_Java_17_20.zip or an equivalent modern Java build |
Java 17 or another runtime explicitly supported by that release | The modern build is described as having better garbage collection and performance on current hardware. Thermos compatibility is the principal reason to avoid it. |
| GTNH 2.8 and later with a Java 25-compatible archive | Java 25 | Java 25 is compatible only with GTNH 2.8 and later. Do not use it for an older release unless that release’s documentation explicitly permits it. |
| Older releases | Usually Java 17–21 for the modern build, or Java 8 for the legacy archive | Follow the runtime named for the exact archive; do not infer compatibility from the Minecraft version alone. |
Archive names have changed between releases, so read the download entry rather than guessing from a filename. The downloads page is the authoritative place to select the server pack: GT New Horizons downloads. As of October 14, 2026, one hosting listing described 2.8.4 as stable and 2.9.0 as beta, while an update guide described 2.9 as supporting both Java 8 and Java 17–25. Because those reports do not establish the current official status of 2.9, verify the release channel on the downloads page when you install.
Use Forge 1.7.10
GTNH runs on Minecraft 1.7.10 and requires the pack’s Forge 1.7.10 environment. Do not assemble a server from a modern vanilla server jar, a different Forge version or a client-only modpack installation.
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Published guidance is not consistent about a hard minimum: one source gives 4 GB, while other guidance says 6 GB or more is the safer starting point. The most consistent start-script figure is a 6 GB heap, and one guide suggests adding about 1 GB for each additional player. Treat these as planning guidance rather than a guaranteed capacity figure.
| Use case | Planning guidance |
|---|---|
| Small test server | Start around a 6 GB heap and watch the server’s behavior. |
| Several concurrent players | Reserve more than 6 GB; a commonly cited rule is roughly 1 GB extra per player. |
| Host operating system | Leave memory for the OS, file cache and other services. Do not assign all installed RAM to Java. |
CPU and storage
Single-thread CPU speed matters more than a high core count because the Minecraft server does not distribute its main workload efficiently across many cores. Choose a recent, high-clock processor when comparing otherwise similar machines.
One hosting guide gives at least 20 GB of storage as the official recommendation, but that figure was not verified in the body of the official wiki. Use 20 GB as a floor for planning only, then allow additional room for world growth, logs, the server pack and backups. Server Utilities backups are approximately the size of the world each time, so a world with multiple backup generations can consume far more space than the initial installation.
Download the correct GTNH server files
- Open the GT New Horizons downloads page and locate the Server ZIP section.
- Choose the exact GTNH release your players will install.
- Choose the archive whose Java variant matches the runtime you will run. A Java 8 server archive and a Java 17–25 archive are different builds.
- Download the server ZIP to the machine that will host the world.
- Do not use a Prism, MultiMC, CurseForge or other client ZIP as the server installation. Those packages have a different purpose and file layout.
Keep a note of the full version number, including every point release. “2.8” and “2.8.4” are not interchangeable for multiplayer compatibility.
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- UNO Minecraft features a deck and storage tin decorated with graphics from the popular video game.
- Players match colors and numbers to the card on top of the discard pile as in the classic game.
- The Creeper card unique to this deck forces other players to draw 3 cards.
- Makes a great gift for kid, teen, adult and family game nights with 2 to 10 players ages 7 years and older, especially Minecraft and video game fans.
Install a self-hosted server on Linux
Install Java
Install the runtime required by the archive you selected. For a Java 25 build on a Debian-based Linux system, one current guide uses:
sudo apt update
sudo apt install openjdk-25-jdkFor a Java 8 or Java 17 archive, install that corresponding runtime instead. Having several Java versions installed is possible, but make sure the command that launches GTNH resolves to the intended one. Check the active runtime before troubleshooting the pack:
java -versionExtract the server pack
- Create a dedicated directory, such as
~/gtnh, for the server. - Copy the downloaded ZIP into that directory.
- Extract it there and keep the extracted files together. Do not move individual libraries, configuration files or the world into separate locations.
- Run the supplied start script or launch command from the extracted directory so relative paths resolve correctly.
Generate and accept the EULA
- Start the server once. The first run creates the EULA file and the initial configuration.
- Stop the process cleanly after the files have been generated.
- Open
eula.txt. - Change
eula=falsetoeula=true, save the file, and start the server again.
Starting from a terminal is preferable to double-clicking a script. A detached or background process is harder to stop cleanly and makes startup errors easy to miss.
Set the heap and launch command
For the modern Java build, a wiki-linked Oracle Cloud guide uses this launch command:
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java -Xms6G -Xmx10G -XX:+UseZGC -Dfml.readTimeout=180 @java9args.txt -jar lwjgl3ify-forgePatches.jar noguiThis example starts with a 6 GB heap and permits growth to 10 GB. Use it only when the downloaded server pack contains the referenced files and when your Java version supports the command. Reduce -Xmx if the machine cannot spare 10 GB, and leave enough RAM for the operating system. The pack’s supplied script may contain release-specific arguments; preserve those arguments when adjusting memory rather than replacing the entire command blindly.
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- First player or team to 500 wins.
- When you're down to one card, don't forget to yell "UNO"!
Install on Windows without losing control of the process
- Install the Java version required by the selected server ZIP.
- Extract the ZIP into a short, dedicated folder such as
C:GTNHserver. - Open PowerShell or Command Prompt in that folder.
- Run the pack’s supplied server script from the terminal, then watch the console for the first-run EULA and configuration messages.
- Stop the server from its console, edit
eula.txt, seteula=true, and start it again.
A terminal window keeps the console visible and gives you a clear way to issue the server’s stop command. If you double-click a batch file and close the window, you can leave a process running or interrupt world saving.
Configure the server after the first successful start
Keep machines running while players are offline
Chunk claiming and chunk loading are off by default. If your production systems must continue operating while no player is online, edit the Server Utilities configuration file serverutilities.cfg and set both options to true:
chunk_claiming=true
chunk_loading=trueMake this change deliberately. Keeping more chunks loaded increases the work the server performs and can raise CPU, memory and storage demands.
Set a backup policy
Server Utilities backups are roughly the size of the world on each run. Before enabling frequent or multiple-generation backups, calculate the free space required for the world, the pack, logs and every retained copy. Store important backups outside the live server machine when possible; a disk failure that destroys the world can also destroy local backup files.
Upload an existing world
An existing GTNH world can be uploaded over SFTP. For large worlds, one guide recommends using FileZilla because a graphical transfer client can make a long upload easier to monitor. Stop the server before replacing its world, preserve the original directory as a rollback copy, upload the complete world folder, and verify ownership and permissions before starting again.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Run GTNH in Docker
Docker is useful when you already operate Minecraft services as containers. The image supports GTNH through the environment setting TYPE=GTNH from version 2025.12.0.
- Use a container image version that includes GTNH support.
- Set the image’s type variable to
GTNH. - Provide persistent storage for the world, configuration, logs and backups.
- Set the EULA variable required by the image and allocate a memory limit appropriate for your chosen heap.
- When selecting the GTNH archive for an update, use the Java 17–2x build recommended by the GTNH container guidance.
- Start the container and inspect its logs for the same EULA, Java and file-generation messages you would see in a direct installation.
Do not treat rebuilding a container as a backup. The world and configuration must live in a persistent volume or bind mount, and that data must be copied separately.
Connect clients and keep versions aligned
Every player must install the exact GTNH version running on the server. For example, a server on 2.8.4 requires clients on 2.8.4, not merely “the 2.8 series.” A mismatch can prevent login or produce mod and registry errors that look like a broken Java installation.
Give players the same Java guidance that applies to the server pack’s client release. The server ZIP and client distribution are separate downloads, but they must describe the same GTNH version and compatible mod set.
Update without risking the world
- Announce downtime and stop the server cleanly.
- Back up the complete server directory, including the world, configuration, scripts, libraries and any custom files.
- Record the current GTNH version and Java variant.
- Download the new server archive from the official downloads page.
- Choose the archive that matches the Java runtime required by the new release. Do not overwrite a Java 8 installation with a Java 17–25 pack by assumption.
- Install the new files in a separate directory or retain a complete rollback copy.
- Apply only the configuration changes you have reviewed, then start the new server and inspect the console before allowing players to join.
- Keep the old directory and backup until the new world has loaded successfully and players have verified their bases and machines.
Reports about GTNH 2.9 are currently inconsistent: one hosting page called 2.9.0 beta, while an update guide described Java 8 and Java 17–25 support. Confirm whether the release is stable and which archive is recommended at the time of your update.
Quick Recap
Troubleshoot the failures that matter most
| Symptom | Likely cause | Action |
|---|---|---|
| The server exits immediately with a Java or class-version error | The runtime does not match the ZIP | Run java -version, identify whether the archive is the Java 8 or modern build, and launch it with the matching runtime. |
| The client cannot join after an update | Client and server versions differ | Compare the complete version strings and install the same GTNH release on both sides. |
| The first launch stops before creating normal files | The process was started from the wrong directory, the archive was incomplete, or required Java arguments were omitted | Extract a fresh copy, launch from its directory, and use the supplied script or release-specific command. |
| Players experience pauses as the world grows | Insufficient heap, CPU pressure or excessive loaded chunks | Check the heap allocation, leave RAM for the OS, review chunk-loading settings and choose a faster single-thread CPU if hardware is the bottleneck. |
| A large world upload is incomplete or the server will not load it | Files were copied while the server was running or the transfer ended early | Stop the server, retain the original world as a backup, transfer the complete folder over SFTP, and verify the extracted directory structure. |
| Backups fill the disk | Each Server Utilities backup is approximately world-sized | Reduce retained generations, expand storage and copy critical backups to another machine. |
| The server keeps running after the window was closed | A script was double-clicked and launched a background process | Start and stop the server from a terminal so the console and process lifecycle remain visible. |
A practical launch checklist
- Choose managed hosting, a self-hosted machine, a VPS or Docker based on who will administer the system.
- Confirm the exact GTNH release and whether it is stable or beta on the downloads page.
- Download a Server ZIP, not a client ZIP.
- Match
_Server.zipwith Java 8 or the modern server archive with its documented Java 17–25 runtime. - Use Forge 1.7.10, the loader required by GTNH.
- Plan around a 6 GB starting heap, add capacity as players join, and leave memory for the operating system.
- Allow at least the commonly cited 20 GB storage floor, plus world growth and world-sized backups.
- Start once, set
eula=true, and launch from a terminal. - Enable chunk claiming and loading only when their performance cost is acceptable.
- Back up the complete server folder before every update.
- Require clients to run the exact server version.
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