// Using ImageMagick to convert all JPEGs to 75% quality //
find . -iname “*.jpg” | xargs -l -i convert -quality 75 {} /tmp/output/{} // Simple
find . -maxdepth 0 -iname “*.jpg” -print0 | xargs -0 -I {} convert -quality 75 {} /tmp/thumbs/{} // More Secure
convert -thumbnail 150×200