Convert multi page pdf to a single jpg file

pdf2image.sh

#! /bin/bash
# set -e 

for file in ./pdf/*
do
	fileName=$(basename -- "$file")
	fileName="${fileName%.*}"
	# echo $filename
	pdfName=./pdf/$fileName.pdf
	outputName=./jpg/$fileName.jpg

	convert -density 150 $pdfName ./output.jpg && convert -append output-*.jpg $outputName && rm output-*.jpg
done