Bash script, accepts directory as single argument, recursively compresses all PDFs in there and subdirectories, uses ghostscript, appends -min to name of compressed file

pdfcompress.sh

#!/bin/bash

find "$1" -name "*.pdf" | while read file; do
  path=${file%/*} 
  basename=${file##*/}
  ext=${basename##*.}
  filename=${basename%.*}
  gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dBATCH -dQUIET -sOutputFile="$path/$filename-min.pdf" "$file"
done