Minecraft – Script – Backup – Update Server – Restart

This is the script I use that will:

  • Automatically backup minecraft map
  • Automatically update minecraft server
  • Automatically restart the server if it stops or dies
#!/bin/bash
while [ true ]; do
   # make md5 of current file for update check.
   md5sum minecraft_server.jar > minecraft_server.jar.md5
   wget -o updatelog.log -N --trust-server-names http://www.minecraft.net/download/minecraft_server.jar
   # display updated status
   if md5sum -c --status minecraft_server.jar.md5 
   then
    echo "Server Up to Date."
   else
    echo "Updated Server!"
   fi
   java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui
   rsync -a --delete --progress /home/dan/serv/minecraft/world "/home/dan/serv/minecraft/bak/world"`eval date +%Y%m%d`""
done

Code Explained:

This will put the server in an infinite loop. You can kill it by hitting Control+C a couple times in a row.

while [ true ]; do

This will make a hash of the current minecraft_server.jar and then download the newest copy using wget.

md5sum minecraft_server.jar > minecraft_server.jar.md5
wget -o updatelog.log -N --trust-server-names http://www.minecraft.net/download/minecraft_server.jar

This will run minecraft in headless mode and with a limit on RAM.

java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui

This will create a backup of the minecraft world folder in a backup folder. You probably should work on this part.

rsync -a --delete --progress /path/to/minecraft/world "/path/to/minecraft/bak/world"`eval date

Well, hope this helps someone. Have a good day.

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