Optimize PNGs and JPGs in a directory using pngcrush and jpegtran

optimize-images.sh

 #!/bin/bash
for f in *.png; do pngcrush -rem alla -reduce -brute $f $f.new; done;
for f in *.jpg; do jpegtran -copy none -optimize $f > $f.new; done;
rm *.png
rm *.jpg
for f in *.new; do mv $f ${f%.*}; done;