Sort pictures into year/month/date folders based on the filename yyyymmdd_x.jpg

phosort.sh

#!/bin/bash

# Read a directory of image files with names on this form: 
# 20110113_001.jpg
# 20110113_002.jpg
# 20110113_003.jpg
# 
# Create folders as needed and move the images into them, in this way
# 2011
# |__01
#    |__13
#       |__20110113_001.jpg
#       |__20110113_002.jpg
#       |__20110113_003.jpg
# 
# Usage: phosort.sh ~/Pictures

cd $1

for f in *
do
  echo $f
  # Construct the direcory path
  dir="${f:0:4}/${f:4:2}/${f:6:2}"
  # Check if the path exists
  if [ ! -e $dir ]
  then
    echo "$dir does not exist"
    # Create the directory if we have to
    mkdir -p "$dir"
  fi
  # Move the file
  mv $f $dir/$f
done