Minecraft server on Ubuntu server

install.sh

# https://zenn.dev/de_teiu_tkg/articles/1b9025d3a6db71
sudo apt-get install openjdk-17-jdk-headless tmux
sudo timedatectl set-timezone Asia/Tokyo

# https://www.minecraft.net/ja-jp/download/server
wget https://piston-data.mojang.com/v1/objects/c9df48efed58511cdd0213c56b9013a7b5c9ac1f/server.jar

sudo mkdir /opt/minecraft-server
sudo mv server.jar /opt/minecraft-server/

sudo cp minecraft-server.service /etc/systemd/system/

sudo ufw allow 25565
sudo ufw allow from <ip address range>

minecraft-server.service

[Unit]
Description=Minecraft Server
After=network-online.target

[Service]
Type=forking
User=ubuntu
WorkingDirectory=/opt/minecraft-server
ExecStart=/bin/bash /opt/minecraft-server/minecraft.sh start
ExecStop=/bin/bash /opt/minecraft-server/minecraft.sh stop
Restart=always

[Install]
WantedBy=multi-user.target

minecraft.sh

#!/bin/bash

# https://0sn.net/posts/20220821/mcserver-systemd/

TMUX_NAME=minecraft-server

case $1 in
  start)
    tmux new-session -s $TMUX_NAME -d "java -jar server.jar nogui";;
  stop)
    tmux send-keys -t $TMUX_NAME "save-all" Enter
    sleep 5
    tmux send-keys -t $TMUX_NAME "stop" Enter
    sleep 20;;
  *)
    echo "start | stop"
esac