#!/bin/bash

which exiftool || sudo apt install exiftool

find -iname "*.jpg"|while read i;                                                                                         
do
  d="$(exiftool -T -DateTimeOriginal "$i"|awk '{print $1}'|cut -d\: -f1,2|tr ":" "/")";
  [[ "$d" ]] && mkdir -p "$d" || d="."
  mv -v "$i" "$d"
done