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Server Start Script Generator

Generate optimized start scripts for any Minecraft server software — with Aikar's JVM flags, auto-restart & more

Server Software

Allocated RAM — 4G

512M32G

JVM Flag Preset

Options

JAR File Name

Extra JVM / Server Args

No GUI (--nogui)

Recommended for servers — disables the Swing server GUI to save RAM

start.sh

#!/bin/bash# Generated by CraftTools — crafttools.net# Server: Paper | RAM: 4G | JVM: aikar cd "$(dirname "$0")" java -Xms4G -Xmx4G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=https://mcflags.emc.gs -Daikars.new.flags=true -jar server.jar --nogui echo ""echo "Server stopped. Restarting in 5 seconds (Ctrl+C to cancel)..."sleep 5exec "$0"

💡 Tips

✓ Paper / Purpur benefit most from Aikar's flags — they reduce lag spikes from garbage collection.

✓ On Linux, make the script executable: chmod +x start.sh

✓ Run as a screen/tmux session: screen -S mc ./start.sh