deluge free space monitor

#!/bin/bash

# Adjust these parameters to your system
fileSystem="/data"     # Filesystem you want to monitor
minFreeSpacePct="10"   # Free space threshold percentage
checkInterval="10"     # Interval between checks in seconds

while (:); do
    # Get the output of df -k and put in a variable for parsing
    dfOutPut=$(df -k ${fileSystem}|tail -n1)

    # Exctract the fields containing total and available 1K-blocks
    totalBlocksKb=$(echo ${dfOutPut} | awk '{print $2}')
    availableBlocksKb=$(echo ${dfOutPut} | awk '{print $4}')

    # Calculate percentage of free space
    let freeSpacePct=100\*${availableBlocksKb}/${totalBlocksKb}

    # Check if free space percentage is below threshold value
    if [ "${freeSpacePct}" -lt "${minFreeSpacePct}" ]; then
        date +'%Y-%m-%d %H:%M:%S'
        echo "You only have ${freeSpacePct}% free space on ${fileSystem}"
        echo "This is below threshold value ${minFreeSpacePct}%"
        echo "Killing deluge"
        pkill deluge
        exit 1
    else
        date +'%Y-%m-%d %H:%M:%S'
        echo "You still have ${freeSpacePct}% free space on ${fileSystem}"
        echo "Threshold value is ${minFreeSpacePct}%"
        echo "All is well"
        sleep ${checkInterval}
    fi
done