query cpu/ram/hdd usage

resource-usage.sh

#!/bin/bash

# from http://unix.stackexchange.com/questions/69167/bash-script-that-print-cpu-usage-diskusage-ram-usage

FREE_DATA=`free -m | grep Mem` 
CURRENT=`echo $FREE_DATA | cut -f3 -d' '`
TOTAL=`echo $FREE_DATA | cut -f2 -d' '`

echo CPU: `top -b -n1 | grep "Cpu(s)" | awk '{print $2 + $4}'`% 
echo RAM: $(echo "scale = 2; $CURRENT/$TOTAL*100" | bc)%
echo HDD: `df -lh | awk '{if ($6 == "/") { print $5 }}' | head -1 | cut -d'%' -f1`%
 
 # list all disks
 echo HDD: `lsblk | grep disk`