[Delete crappy (raw) photos] I shoot photos in RAW and JPG. To delete unnecessary raw files I delete the bad JPG photos doing a preview to all photos. Then I run this script to remove the raw files too.

delete_raw.sh

for x in *.CR2
do
  echo $x
  FILE="./"${x%.*}".JPG"
  echo "File= "$FILE
  if [ -f "$FILE" ];
  then
    echo "File $x exist"
  else
    echo "File $x does not exist. Removing."
    rm $x
  fi

done

echo "Removing Darktable files"
rm *.xmp