NatGeo - Download a month's photos
     NG_download_month.sh    #!/bin/sh CYAN='\033[0;36m' YELLOW='\033[1;33m' NC='\033[0m' # No Color currentPath=`pwd` currentYear=`date +"%Y"` currentMonth=`date +"%m"` downloadYear=$1 downloadMonth=$2 force=$3 if [ $# -lt 2 ] then  echo "YEAR and MONTH arguments required; eg: ./NG_download_month.sh 2017 06"  exit fi jsonFilename="gallery."$downloadYear"-"$downloadMonth".json"  if [ $currentYear -eq $downloadYear -a $currentMonth -eq $downloadMonth ] then  echo "${CYAN}Current month${NC} images get update. Deleting file: $jsonFilename"  rm $jsonFilename elif [ $force == '-f' ] then  echo "Force deleting file: $jsonFilename"  rm $jsonFilename fi  if [ ! -f $jsonFilename ] then  echo "${YELLOW}$jsonFilename${NC} unavailable. Downloading..."  # BASE_URL="http://www.nationalgeographic.com/photography/photo-of-the-day/_jcr_content"  BASE_URL="https://www....
 
 
