Prints HDD/Memory Usage (bash)

output.shell

--------------------------------------------------|Usage|--------------------------------------------------
Memory Usage: [###############-------------------------] 38% (372M/962M, 194M available)
Disk Usage: [##########------------------------------] 26% (5G/19G, 13G available)
-----------------------------------------------------------------------------------------------------------

usage.sh

#!/bin/bash

TOTAL_MEM=`free -m | awk 'NR==2{print $2}'`
USED_MEM=`free -m | awk 'NR==2{print $3}'`
FREE_MEM=`free -m | awk 'NR==2{print $4}'`

TOTAL_DISK=`df -h | awk 'NR==4{print $2}' | tr -d -c 0-9`
USED_DISK=`df -h | awk 'NR==4{print $3}'`
FREE_DISK=`df -h | awk 'NR==4{print $4}' | tr -d -c 0-9`

# First arg is the total free, second is the used amount
# Third arg is the available amount, fourth is the name of what we're measuring
# Fifth arg is the measurement unit (i.e 'M' or 'G')
function UsageBar {
	# Process data
	let _progress=(${2}*100/${1})
	let _done=(${_progress}*4)/10
	let _left=40-$_done

	# Build progressbar string lengths
	_done=$(printf "%${_done}s")
	_left=$(printf "%${_left}s")

	printf "${4} Usage: [${_done// /#}${_left// /-}] ${_progress}%% (${2}${5}/${1}${5}, ${3}${5} available)\n"
}

echo "--------------------------------------------------|Usage|--------------------------------------------------"
UsageBar ${TOTAL_MEM} ${USED_MEM} ${FREE_MEM} 'Memory' 'M'
UsageBar ${TOTAL_DISK%.*} ${USED_DISK%.*} ${FREE_DISK%.*} 'Disk' 'G'
echo "-----------------------------------------------------------------------------------------------------------"