Reduce PDF Filesize

gistfile1.txt

for file in *.pdf;
do;
$(gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile=c-$file $file);
echo "PROCESSED : $file";
done

Replacing last 4 chard for file

mv -v $name | echo $name | sed 's/.\{4\}$//'

Removing .pdf for all filename

for file in *.pdf;                               
do              
mv -v $file $(echo $file | sed 's/.\{4\}$//');
done