especificosweb/Images/slider/resizer.sh

#!/bin/bash
for i in $(ls slide[0-9].jpg); do
	for f in 500 1024 1400 1920; do
		newfile=$(echo $i | cut -d"." -f 1)-$f.jpg
		if [ ! -f $newfile ]; then
			convert $i -resize "$f"x-1 $newfile &
		fi
	done
done