14 How to batch convert all .png files to .jpg?

Thanks to http://www.turnkeylinux.org/blog/png-vs-jpg

apt-get install imagemagick 
 
#one file 
convert -flatten -background white file.png file.jpg 
 
#batch 
for f in *.png; do 
    n=$(echo $f|sed 's/.png/.jpg/'); 
    convert -flatten -background white $f $n 
done