icloud_photos_downloader/examples/cron_script.sh.example

#!/bin/bash
# Make sure it's not already running
pgrep -f icloudpd && echo "icloudpd is already running." && exit

icloudpd /your/photos/directory \
  --username testuser@example.com \
  --password pass1234 \
  --recent 500 \
  --auto-delete