pdf script optimizer https://tex.stackexchange.com/questions/18987/how-to-make-the-pdfs-produced-by-pdflatex-smaller

opt.sh

#!/bin/bash
#
# optpdf file.pdf
#   This script will attempt to optimize the given pdf

file="$1"
filebase="$(basename "$file" .pdf)"
optfile="/tmp/$$-${filebase}_opt.pdf"
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile="${optfile}" "${file}"
# -dPDFSETTINGS=/screen   (screen-view-only quality, 72 dpi images)
# -dPDFSETTINGS=/ebook    (low quality, 150 dpi images)
# -dPDFSETTINGS=/printer  (high quality, 300 dpi images)
# -dPDFSETTINGS=/prepress (high quality, color preserving, 300 dpi imgs)
# -dPDFSETTINGS=/default  (almost identical to /screen)

if [ $? == '0' ]; then
    optsize=$(stat -c "%s" "${optfile}")
    orgsize=$(stat -c "%s" "${file}")
    if [ "${optsize}" -eq 0 ]; then
        echo "No output!  Keeping original"
        rm -f "${optfile}"
        exit;
    fi
    if [ ${optsize} -ge ${orgsize} ]; then
        echo "Didn't make it smaller! Keeping original"
        rm -f "${optfile}"
        exit;
    fi
    bytesSaved=$(expr $orgsize - $optsize)
    percent=$(expr $optsize '*' 100 / $orgsize)
    echo Saving $bytesSaved bytes \(now ${percent}% of old\)
    rm "${file}"
    mv "${optfile}" "${file}"
fi