Question

This is a follow up to an earlier question about a terminal script for Minecraft that will start up a server with 1 gigabyte of ram, and promptly begin a 30 minute loop that will make frequent backups of the server map.

This is the code I’m currently working with:

cd /Users/userme/Desktop/Minecraft
java -Xmx1024M -Xms1024M -jar minecraft_server.jar & bash -c 'while [ 0 ]; do cp -r /Users/userme/Desktop/Minecraft/world /Users/userme/Desktop/A ;sleep 1800;done' 

Now obviously, this loop will save the backups in directory “A” with the name “world”. Is there a modification I can make to this code so that it basically counts the amount of loops the script makes, and then applies that count to the end of the backups. For example, world5, or world 12. A modification that can get rid of old backups would be nice as well.

Answer 1

I broke it down into separate lines for better readability:

If you want to put it back all into one line, you can add the ; back in where appropriate

counter=1
while [ 0 ] 
do 
    if [ -e /Users/userme/Desktop/A/world"$counter" ]; then
        rm -f /Users/userme/Desktop/A/world"$counter"
    fi
    counter=$((counter+1))
    cp -r /Users/userme/Desktop/Minecraft/world /Users/userme/Desktop/A/world"$counter" 
    sleep 1800
done