Optimize images in a WordPress installation using Bash

optimize.sh

# You need a recent version of  jpegoptim and pngquant for this

yes | apt-get install jpegoptim
yes | apt-get install pngquant;

# Navigate to your wp-content/uploads

#optimize JPEG
optimizelossy() { jpegoptim -v *.jpg  --max=80; for i in *; do if test -d $i;  then cd $i; echo $i;  optimizelossy; cd .. ; fi;   done;   echo; }
optimizelossy

# Optimize PNG
find . -name '*.png' -exec pngquant --quality=70-80 -f  --force 256 {} \;

# Fix permissions
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;