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minecraft-modpack-server

Configures and launches modded Minecraft servers from CurseForge or Modrinth server packs.

Updated Jul 7, 2026
Search Tags:#server setup#forge#minecraft#neoforge#modpack#jvm tuning#backup automation
One-click install
npx skills add https://github.com/episvr/USTB-2026-SummerInternship --skill minecraft-modpack-server-episvr
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: minecraft-modpack-server
Source: https://github.com/episvr/USTB-2026-SummerInternship/tree/main/hermes-config/optional-skills/gaming/minecraft-modpack-server
Command: npx skills add https://github.com/episvr/USTB-2026-SummerInternship --skill minecraft-modpack-server-episvr

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Setting up a modded Minecraft server involves many error-prone manual steps: installing the correct Java version, running the NeoForge/Forge installer, tuning JVM garbage collection flags, editing server.properties, opening firewall ports, and configuring backups. This Skill walks through the entire process with tested defaults and known pitfalls. ## Core Features & Use Cases - End-to-End Server Pack Setup: Downloads and inspects server pack zips, installs the matching Java version (8/17/21), and runs the mod loader installer without launching. - Performance Tuning: Provides RAM allocation rules based on mod count, G1GC JVM arguments, and view/simulation distance presets scaled to player count and hardware. - Operations Automation: Creates a clean launch script, configures ufw firewall rules for port 25565, and sets up hourly cron-based world backups with automatic pruning. - Use Case: A user downloads an All The Mods 10 server pack and wants to host it for friends. The Skill gathers preferences (seed, difficulty, online mode, RAM), installs Java 21, runs the installer with ATM10_INSTALL_ONLY, writes tuned configs, and leaves a running server with hourly backups. ## Quick Start Set up a modded Minecraft server from this server pack zip URL and configure it for 4 players with automated hourly backups.

Frequently Asked Questions about minecraft-modpack-server

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up a modded Minecraft server from a server pack?▼

Download and unzip the server pack, install the Java version matching your Minecraft release, then run the pack's installer script with an install-only flag. Accept the EULA, configure server.properties, and launch with the provided JVM args file.

Which Java version does my Minecraft server need?▼

Minecraft 1.21 and newer requires Java 21, versions 1.18 through 1.20 require Java 17, and 1.16 or older runs on Java 8. Install the headless JRE package and verify with java -version before starting the server.

How much RAM should I allocate to a modded Minecraft server?▼

Allocate 6-12GB for packs with 100-200 mods and 12-24GB for packs with 200-350 or more mods. Always leave at least 8GB free for the operating system, and set Xms and Xmx in user_jvm_args.txt.

Why do players get kicked for flying on a modded server?▼

The vanilla server kicks players when allow-flight is false, but modded packs include jetpacks and flying mounts that trigger this check. Set allow-flight=true in server.properties to prevent false kicks.

Why is my modded server slow on first startup?▼

First launches take several minutes because large modpacks generate chunks and initialize registries. 'Can't keep up!' warnings during initial world generation are normal and settle afterward; raising max-tick-time to 180000 prevents watchdog crashes.

How do I run a Minecraft server without Mojang authentication?▼

Set online-mode=false in server.properties for LAN or offline play, and also set enforce-secure-profile=false or clients will be rejected. This disables Mojang account verification, so restrict access with a whitelist.

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