To install the required dependencies:

1. Install the tmux package:

   From ports: cd /usr/ports/sysutils/tmux && make install clean

   With pkg: pkg install tmux

2. Install a Java version of your choice. Keep in mind that certain versions of Minecraft require Java 17 or higher. I would recommend using OpenJDK 17 JRE:

   from ports: cd /usr/ports/java/openjdk17-jre && make install clean

   With pkg: pkg install openjdk17-jre

For the Minecraft server:

1. Create a user for the Minecraft server:

   pw user add -n minecraft -c 'Minecraft Server' -d /usr/local/minecraft -m -s /bin/sh

2. Download the .jar file for the Minecraft server version of your choice and place it in the Minecraft user's home directory: /usr/local/minecraft

3. Create a tmux configuration file in the Minecraft user's home directory:

   echo "set -g default-terminal screen-256color" > /usr/local/minecraft/.tmux.conf

4. Make sure all the files in the Minecraft user's home directory are owned by the Minecraft user:

   chown -R minecraft:minecraft /usr/local/minecraft

5. put the minecraft script in /usr/local/etc/rc.d and make it executable with chmod 755 /usr/local/etc/rc.d/minecraft

6. Enable the startup script via sysrc minecraft_enable=YES

   If you chose a custom user, home directory or .jar file you can set them via, for example:

   sysrc minecraft_user=example

   sysrc minecraft_dir=/home/example

   sysrc minecraft_jar=exmample.jar

   Optionally you can pass custom flags to Java, for example:

   sysrc minecraft_flags=-Xmx4G

Note: If you do not create the tmux configuration file with this line in it, the server will still run, but Java will throw an exception about not knowing the terminal type upon starting the Minecraft server.

Once you have completed these steps:

• To start the Minecraft server: service minecraft start

• To stop the Minecraft server: service minecraft stop

• To check if the server is running: service minecraft status

• To open the Minecraft server console: service minecraft console

  You can now use the console to manage your Minecraft server. To exit the console again, press CTRL-B and then D.