Note that the following commands have not been tested, but based off of other ones so should work.
Open a terminal and run the following two commands to delete level.dat and level.dat_old
rm ~/.minecraft/saves/Demo_World/level.dat rm ~/.minecraft/saves/Demo_World/level.dat_old
Should be able to open up Minecraft and have the timer reset. Note that all the achievments in the game will be reset as well.
Open Windows File Explorer, in the Address Bar paste the following and hit enter.
%APPDATA%\.minecraft\saves\Demo_World\
You should now be in the demo world folder.
Delete the “level.dat” and “level.dat_old” files and restart minecraft. Your timer should now be reset as well as all the game objectives.
Create tmpfs ramdisk. Note if your Linux user is something other than steve you’ll need to change where appropriate.
mkdir /home/steve/mcdisk
In etc/fstab add the following
tmpfs /home/steve/mcdisk tmpfs defaults,size=4096m 0 0
This creates a 4GB ram disk at /home/steve/mcdisk
To mount it you can either reboot, or run
mount -a
Copy your current Minecraft directory to the ram disk
cp -R /home/steve/Current_MC_Server/ /home/steve/mcdisk
Create a Bash script in “/home/steve” named “ramdisk_save.sh”
Paste the following in. You may need to install rsync if you do not have it installed
!/bin/bash RAMDISK="/home/steve/mcram/" MCDIR="/home/steve/1.13" rsync -r -t $RAMDISK/ $MCDIR/ rsync -r -t $MCSTORE/ $MCPATH/
Now add the script to crontab
crontab -e
and
*/5 * * * * /home/steve/ramdisk_save.sh
This will now run every 5 minutes and sync any changes on the ram disk to the original directory.
Start the Minecraft server
java -Xmx3072M -Xms3072M -jar server.jar nogui
Update system
yum update -y
Install Java and wget
yum install -y java wget
Allow Minecraft port through the firewall
Insert the following line in your iptables config file, found in “/etc/sysconfig/iptables”
-A INPUT -m state --state NEW -m tcp -p tcp --dport 25565 -j ACCEPT
Example:
vi /etc/sysconfig/iptables # Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 25565 -j ACCEPT <--- Added Rule -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT ~ ~ :wq "/etc/sysconfig/iptables" 14L, 544C written [root@localhost ~]# service iptables restart iptables: Setting chains to policy ACCEPT: filter [ OK ] iptables: Flushing firewall rules: [ OK ] iptables: Unloading modules: [ OK ] iptables: Applying firewall rules: [ OK ] [root@localhost ~]#
you will need to edit the network config file in “/etc/sysconfig/network-scripts/ifcfg-eth0”
DHCP
If your using DHCP then just change “ONBOOT=no” to “ONBOOT=yes”
Static
If you need a static address, then change “ONBOOT=no” to “ONBOOT=yes” and change “BOOTPROTO=dhcp” to “BOOTPROTO=static”
add the following to “/etc/sysconfig/network-scripts/ifcfg-eth0”
IPADDR=192.168.1.100 NETMASK=255.255.255.0 GATEWAY=192.168.1.1 BROADCAST=192.168.1.255 DNS1=1.1.1.1
Start Minecraft server on system boot
Create user
useradd -m steve
Create password for steve
passwd steve
Login as your new user.
su steve
Go to user root directory
cd ~/
Download the minecraft server jar
wget https://s3.amazonaws.com/Minecraft.Download/versions/1.8.7/minecraft_server.1.8.7.jar
Create a directory for the start up script and create start up script.
mkdir /home/steve/mc touch /home/steve/mc/mcstart.sh
Copy and paste the following text into mcstart.sh
#! /bin/sh
# /etc/init.d/mcserver
### BEGIN INIT INFO
# Minecraft CraftBukkit Start script
### END INIT INFO
case "$1" in
start)
echo "Starting mcserver"
MCDIR="/home/steve/"
cd "$MCDIR"
java -Xmx512M -jar minecraft_server.1.8.7.jar -o true &
;;
stop)
echo "Stopping mcserver"
kill `pgrep mcserver`
;;
*)
echo "Usage: /etc/init.d/mcserver {start|stop}"
exit 1
;;
esac
exit 0
Make the script executable
chmod +x /home/steve/mc/mcstart.sh
Add mcstart.sh to the crontab
Access the crontab by running the following command
crontab -e
Add the following to the crontab.
@reboot /home/steve/mc/mcstart.sh start
Start the server.
/home/steve/mc/mcstart.sh start
Note: Starting the server will fail because you need to agree to the end user license agreement.
Agree to the eula
sed -i s/false/true/g eula.txt
Reboot the server and connect to your new Minecraft server.
Open up Finder and hit the Shift, Command, and “G” key simultaneously and then type in ~/Library/Application Support/minecraft/saves/Demo_World and hit return.
This should put you in your Demo World minecraft directory.
Now delete the “level.dat” and “level.dat_old” files and restart minecraft. Your time should now be reset… As well as your Objectives.
First we need to Install Java.
sudo apt-get install openjdk-7-jre
Next lets create a CraftBukkit directory to store all the files.
mkdir ~/mc-bukkit cd ~/mc-bukkit
And lets download CraftBukkit.
wget "http://dl.bukkit.org/downloads/craftbukkit/get/02389_1.6.4-R2.0/craftbukkit.jar" -O "craftbukkit.jar"
Now lets create a script that we can use to start the Server.
sudo vi /etc/init.d/mcstart.sh
Copy and paste the following text.
#! /bin/sh
# /etc/init.d/mcserver
### BEGIN INIT INFO
# Minecraft CraftBukkit Start script
### END INIT INFO
case "$1" in
start)
echo "Starting mcserver"
MCDIR=$("/home/pi/craftbukkit")
cd "$MCDIR"
java -Xmx512M -jar craftbukkit.jar -o true &
;;
stop)
echo "Stopping mcserver"
kill `pgrep mcserver`
;;
*)
echo "Usage: /etc/init.d/mcserver {start|stop}"
exit 1
;;
esac
exit 0
Now lets make the file executable.
chmod +x mcstart.sh
And launch
sudo /etc/init.d/mcstart.sh
The first lunch will take a long time so be patient.
If you want to start CraftBukkit when your Pi boots up then run the following command.
sudo /etc/init.d/mcstart.sh start