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minecraft-modpack-server

Configure and host modded Minecraft servers from CurseForge and Modrinth server packs.

Updated May 3, 2026
Search Tags:#forge#minecraft#neoforge#modpack#jvm tuning#backup automation#server hosting
One-click install
npx skills add https://github.com/80portisfound/vibe-learning --skill minecraft-modpack-server-80portisfound
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: minecraft-modpack-server
Source: https://github.com/80portisfound/vibe-learning/tree/main/packages/hermes/skills/gaming/minecraft-modpack-server
Command: npx skills add https://github.com/80portisfound/vibe-learning --skill minecraft-modpack-server-80portisfound

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, configuring server.properties for modded gameplay, and arranging backups. This Skill walks through the entire process with tested defaults and known pitfalls. ## Core Features & Use Cases - End-to-End Server Setup: Download a server pack zip, install the matching Java version, run the mod loader installer, accept the EULA, and launch the server. - Performance Tuning: Provides JVM G1GC flags, RAM sizing rules based on mod count, and view/simulation distance presets scaled to player count and hardware. - Automated Backups: Includes a cron-based world backup script with rotation that keeps the 24 most recent archives. - Use Case: A user downloads an All The Mods 10 server pack and wants to host it for friends on a home Linux machine. The Skill installs Java 21, runs the installer with ATM10_INSTALL_ONLY, writes a tuned server.properties and launch script, opens the firewall port, and schedules hourly backups. ## Quick Start Set up a modded Minecraft server from this server pack zip URL and configure it for 4 players with 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 the Minecraft release, then run the pack's installer script or the Forge installer jar. After that, accept the EULA, configure server.properties, and launch with the pack's args files.

Which Java version do I need for my Minecraft server?▼

Minecraft 1.21 and newer requires Java 21, versions 1.18 through 1.20 require Java 17, and 1.16 or older requires Java 8. Install the headless JRE package, such as openjdk-21-jre-headless, and verify with java -version.

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 other tasks, and set both Xms and Xmx in user_jvm_args.txt.

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

Vanilla flight detection kicks players using modded jetpacks or flight items. Set allow-flight=true in server.properties, which is required for modded servers that include flight-granting mods.

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

Set online-mode=false in server.properties to allow players without Mojang accounts. You must also set enforce-secure-profile=false, otherwise clients will be rejected when connecting.

Why is my modded server slow or showing 'Can't keep up' warnings on first launch?▼

First startup of a large modpack takes several minutes due to initial chunk generation, and 'Can't keep up' warnings are normal during this phase. Raise max-tick-time to 180000 and wait for the 'Done' message in the log before connecting.

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