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Minecraft Server Setup

Install requirements

sudo apt install wget screen default-jdk nmap

Create Minecraft user to run the server

The minecraft user will have a home directory in /opt/minecraft

sudo useradd -m -r -d /opt/minecraft minecraft

Create directroy for server

Multiple servers can be run, create a directory for the particular server, folliwng the link below, using “survival”

sudo mkdir /opt/minecraft/survival

Download the mincraft server jar file

go here to find the link to the current server

https://www.minecraft.net/en-us/download/server

sudo wget -O /opt/minecraft/survival/minecraft_server.jar https://launcher.mojang.com/v1/objects/bb2b6b1aefcd70dfd1892149ac3a215f6c636b07/server.jar

Set up server

Accept the terms uf the EULA

sudo bash -c "echo eula=true > /opt/minecraft/survival/eula.txt"

Make the minecraft user the owner

sudo chown -R minecraft /opt/minecraft/survival/

Setup systemd startup script by creating a script

sudo nano /etc/systemd/system/minecraft@.service

And inserting these contents

[Unit]
Description=Minecraft Server: %i
After=network.target

[Service]
WorkingDirectory=/opt/minecraft/%i

User=minecraft
Group=minecraft

Restart=always

ExecStart=/usr/bin/screen -DmS mc-%i /usr/bin/java -Xmx4G -jar minecraft_server.jar nogui

ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "say SERVER SHUTTING DOWN IN 5 SECONDS. SAVING ALL MAPS..."5'
ExecStop=/bin/sleep 5
ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "save-all"5'
ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "stop"5'


[Install]
WantedBy=multi-user.target

Run the server

Start the server

$ sudo systemctl start minecraft@survival

Check server status

sudo systemctl status minecraft@survival

Set server to start on boot

sudo systemctl enable minecraft@survival

The server can be stopped with

$ sudo systemctl stop minecraft@survival

server setting

Minecraft server settings are in this file

sudo nano /opt/minecraft/linuxconfig/server.properties

User permission settings can be set in the file ops.json, using the following format:

[
  {
    "uuid": "UUID-USER-1",
    "name": "user1",
    "level": 4,
    "bypassesPlayerLimit": false
  },
  {
    "uuid": "UUID-user-2",
    "name": "user2",
    "level": 4,
    "bypassesPlayerLimit": false
  }
]

You can find UUIDs for users here https://mcuuid.net/

References

https://linuxconfig.org/ubuntu-20-04-minecraft-server-setup