JPG verkleinern

for i in `ls *.jpg`; do convert -resize "AUFLÖSUNG" $i klein_dateiname.jpg; done

z.B.

for i in `ls *.jpg`; do convert -resize "1024x786" $i klein_$i; done

for i in `ls *.JPG`; do convert -resize "1024x786" $i klein_$i; done