Minecraft server(s) using systemd and screen.

README.md

Install

# Install dependencies
sudo yum install -y java-1.8.0-openjdk screen

# Create a new unprivileged user for minecraft
useradd -r -m -d /opt/minecraft minecraft

# Create the directory that will house our minecraft instances
sudo su --shell /bin/bash minecraft
mkdir instances
exit

# Copy the [email protected] file into the correct place.
sudo vi /etc/systemd/system/[email protected]

# Reload systemd units
sudo systemctl daemon-reload

Provision a new server

# Sudo into the minecraft user's shell
sudo su --shell /bin/bash minecraft

# Move into the instances directory
cd instances

# Create a new folder to house your instance
mkdir server1

# Install your minecraft instance, and make sure there is a minecraft_server.jar file.
# If you use Forge servers, you can use the following:
ln -s forge*.jar minecraft_server.jar

# Start and enable (start after boot) the server.
sudo systemctl start minecraft@server1
sudo systemctl enable minecraft@server1

[email protected]

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

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

User=minecraft
Group=minecraft

Restart=always

ExecStart=/usr/bin/screen -DmS mc-%i /usr/bin/java -Xmx2G -jar minecraft_server.jar nogui

ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "say SERVER SHUTTING DOWN IN 15 SECONDS..."\015'
ExecStop=/bin/sleep 5
ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "say SERVER SHUTTING DOWN IN 10 SECONDS..."\015'
ExecStop=/bin/sleep 5
ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "say SERVER SHUTTING DOWN IN 5 SECONDS..."\015'
ExecStop=/bin/sleep 5
ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "save-all"\015'
ExecStop=/usr/bin/screen -p 0 -S mc-%i -X eval 'stuff "stop"\015'

[Install]
WantedBy=multi-user.target

Hi, I have an error: screen[2355]: No screen session found. Any ideas what might be wrong? (Ubuntu 20.04)

Will this work with 1.18.1 java @user_jvm_args.txt @libraries/net/minecraftforge/forge/1.18.1-39.0.45/unix_args.txt "$@"?

To view the console su to minecraft with:

sudo su minecraft

then

screen -R mc-server1

Don't use sudo su. Instead, do sudo -u minecraft -s, or directly sudo -u minecraft screen -R mc-server1

Cheers

This thread helped me out. Thanks 👍