30-diskspace

#!/bin/bash
# This script displays the usage of specified disks
# Base version used for this script: https://github.com/Heholord/FalconStats/blob/master/scripts/discspace.sh


clear="\e[39\e[0m"
dim="\e[2m"

# The parameter maxDiskUsage indicates when the bar should be displayed as red
maxDiskUsage=80

# The parameter barWidth indicates how long the disk usage bar should be
barWidth=50

# mountpoints contains all the directories which devices should be monitored
# Examples: mountpoints="/ /boot /home" - this will monitor the devices mounted
mountpoints="/"

# Make space above
echo ""
echo "disk usage:"

for point in ${mountpoints}; do
    # Get the output of df and add spaces after the newlines
    # If you only want local partitions, you can add the -l flag to the df command
    line=$(df -h "${point}" | sed -e ':a;N;$!ba;s/\n/\n  /g')
    usagePercent=$(echo "$line" | tail -n1 | awk '{print $5;}' | sed 's/%//')
    usedBarWidth=$(((usagePercent * barWidth) / 100))
    barContent=""
    color="\e[32m"

    # Color the bar red in case it's bigger than the speicified value
    if [ "${usagePercent}" -ge "${maxDiskUsage}" ]; then
        color="\e[31m"
    fi
    barContent="${color}"

    # Build the usage bar
    for _ in $(seq 1 $usedBarWidth); do
        barContent="${barContent}="
    done

    # Rest of the unused space in white
    barContent="${barContent}${clear}${dim}"
    for _ in $(seq 1 $((barWidth - usedBarWidth))); do
        barContent="${barContent}="
    done
    bar="[${barContent}${clear}]"

    # Print the column/title bar
    if [ "${titeled}" == "" ]; then
        echo "  ${line}"
        titeled="1"
    else
        echo "  ${line}"|tail -n1
    fi
    echo -e "  ${bar}"
done