#!/bin/bash

# User should input the threshold
echo "Enter the threshold (percent):"
read threshold

# Check if the threshold is a number
if ! [[ "$threshold" =~ ^[0-9]+$ ]]; then
    echo "Input is not a number, using default threshold: 20."
    threshold=20
else
    echo "Threshold = $threshold"
fi

df -h | awk -v threshold="$threshold" 'NR>1 {gsub(/%/,"",$5); if($5 > threshold) print "WARNING: Partition \""$1"\" used "$5"%"}'