Small bash script to remove small cover images (or really, any small resolution images)

smallcoverkill.sh

#! bin/bash
cd ~/Music
echo "Run this script from your base music directory (or wherever you want to purge png and jpg images from)"
echo "Currently in $PWD"
echo "What is the minimum resolution you want?"
read request
# test for number without decimal
if [ "$request" -eq "$request" ] 2>/dev/null; then
	echo "Finding jpg covers."
	find . -iname "*.jpg" -exec ls -f '{}' \; > tempfile.txt
	echo "Finding png covers."
	find . -iname "*.png" -exec ls -f '{}' \; >> tempfile.txt
	echo "testing covers..."
	while read line; do 
	#    tmp=$(identify $line | awk '{print $3}' | awk -F 'x' '{ print $1 "/" $2 }')
	    tmp=$(identify "$line" | awk '{print $3}' | awk -F 'x' '{ print $1 }')
	    if [ "$tmp" -lt "$request" ]; then
	    	icky=$(basename "$line")
	    	echo "File $line has resolution of $tmp," 
	    	echo "which is less than requested resolution of $request; deleting."
		fullpath=$(realpath "$line")
		echo "$fullpath"
	    	rm -f "$fullpath"
	    fi
	done < tempfile.txt
else
	echo "That isn't a number."
fi