#!/bin/bash

CR='\033[0;31m'
CYW='\033[1;33m'
CG='\033[0;32m'
CB="\e[1;34m"
NC='\033[0m' # No Color

# Titel
echo -e ""
echo -e "${CB}disk usage:${NC}"
echo -e ""
echo -e "  Filesystem                                       Size  Used"

df -h --output=source,size,pcent,target | tail -n +2 | \
grep -Ev 'tmpfs|devtmpfs|udev|squashfs|overlay|nfs|cifs|smbfs|fuse|proc|sysfs' | \
while read -r fs size pcent target; do
  usage=${pcent%\%}

  if [ "$usage" -ge 90 ]; then
    color=$CR
  elif [ "$usage" -ge 70 ]; then
    color=$CY
  else
    color=$CG
  fi

  printf "  %-46s %6s  ${color}%4s${NC}\n" "$target" "$size" "$pcent"
done