Move files

#!/bin/bash -e
if [[ ! -d $1 ]]; then
  echo "usage: $0 DIR"
  exit 1;
fi
mkdir -p /tmp/tmp$$
for dir in $1/*; do
  if [[ ! -d $dir ]]; then
    continue
  fi
  for jpg in $dir/*.jpg; do
    mv $jpg /tmp/tmp$$/$(basename $dir)_$(basename $jpg)
  done
  rmdir $dir
done
mv /tmp/tmp$$ JPEG