Makes it easy to switch Bukkit/SpigotMC Minecraft server worlds. We have two worlds on our Raspberry Pi and switching requires backing up one world and moving the other out of backup. This automates the process and also runs the server afterwards (can also run current world using "run" argument).

switch_to_server.sh

#!/bin/bash
if [ $# -ne 2 ]
then
    if [ "$1" != "run" ]
    then
        echo "Usage: $0 <world to backup> <world to unpack>"
        echo "For best results, run with sudo."
        exit
    else
        java -Xms256M -Xmx496M -jar -XX:MaxPermSize=128M /home/pi/SpigotMC/spigot.jar nogui
    fi
fi

mkdir -p "$1_Backup"
mv "$1_the_end" "$1_nether" "$1" "server.properties" "$1_Backup"

if [ ! -d "$2_Backup/" ]
then
    echo "Your other world should already be in ./$2_Backup"
    exit
fi

mv "$2_Backup/"* "."

java -Xms256M -Xmx496M -jar -XX:MaxPermSize=128M /home/pi/SpigotMC/spigot.jar nogui