---
title: "How to install a Fabric server in the panel"
icon: lucide/layers
description: "How to install the Fabric Loader on a Java server: download the installer, upload the jar, rename it, and set the Startup variables."
---

# How to install a Fabric server in the panel

Fabric is a lightweight mod loader for Minecraft Java Edition.

## Preparation

- Make sure your service is active and the server is **stopped** before you begin.
- Decide on the Minecraft version, Fabric Loader version, and Fabric Installer version you want to use. This guide uses these as an example:
    - Minecraft `1.21.4`
    - Fabric Loader `0.16.2`
    - Fabric Installer `1.0.2`
- The minimum recommended RAM for a Fabric server with mods is **6 GB**.

!!! warning "Minimum RAM"
    A Fabric server with mods requires **at least 6 GB of RAM**. Plans with less RAM will fail to load mods.

## Installation steps

1. Open the official Fabric site and download the **Executable Server (.jar)** for the Minecraft, Loader, and Installer combination you want.
2. Go to `https://panel.nexuscloud.id/` and select your server.
3. Open the **Files** menu, click **Upload Files**, and upload the Fabric installer you just downloaded. Wait until the upload finishes.
4. Click the three-dot icon (`⋮`) next to the uploaded file, choose **Rename**, and rename it to `fabric-server-launch.jar`.
5. Open the **Startup** menu, then:
    - Fill in the Fabric version variables with your combination, for example `1.21.4`, `0.16.2`, `1.0.2`.
    - If available, change **Server Jar File** from `server.jar` to `fabric-server-launch.jar`.
    - Switch **Docker Image** to `Java 21 Temurin` if you are using Minecraft 1.21 or newer.
6. Open the **Console** menu, then click **Start** to boot the server.
7. Wait until the console shows the server is ready to accept connections, then try joining from the Minecraft client.

## Changing the Fabric version

If you want to switch to a different Fabric version:

1. Delete the old `mods` and `world` folders, and the old `fabric-server-launch.jar` file.
2. Repeat steps **1-6** above with the new installer.

## Notes

- The Fabric Loader version must match the Minecraft version you are using.
- If the server fails to start, check the console for errors mentioning a Java version. Modern Fabric generally requires Java 17 or higher.
- Always back up your world before changing the Fabric version or adding new mods.

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