A friend had a small problem to add a page number on a PDF with a lot of pages.
After a quick chat, I have built this script:
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						#!/bin/bash # Author: Brice Lilot # Contact: brice_lilot [at] visualstation [dot] be # Website: http://www.visualstation.be/ # Revision: 0.1 # Last modification: #   * 2012-05-09: #    - First shot ! # if [ -d $1 ] then 	printf "The directory already existn" 	cd $1 	rm -rf *.jpg	 else 	mkdir $1 	cd $1 fi whereismyfont=`find /usr/share/fonts -iname "DejaVuSans.ttf"` gs -dBATCH -dNOPAUSE -dSAFER -sDEVICE=jpeg -dJPEGQ=95 -r600x600 -sOutputFile=./$1-page-%d.jpg ../$1.pdf >> /dev/null cFiles=`find . -iname "*.jpg" | wc -l` for (( i=1; i <= $cFiles; i++)) do 	mogrify -quality 100% -font $whereismyfont  		-pointsize 90 -draw "gravity southeast fill #000000 text 600,300 '$i/$cFiles'"  		$1-page-$i.jpg 		printf "Page $i converted and numberedn" done param="" for (( i=1; i <= $cFiles; i++)) do    dimension=$(identify -format "%[fx:(w)] %[fx:(h)]" "$1-page-${i}.jpg")    param="${param} >>/PageSize [${dimension}]<< setpagedevice ($1-page-${i}.jpg) viewJPEG showpage" done gs    -sDEVICE=pdfwrite    -dPDFSETTINGS=/prepress    -o "$1_final.pdf"     viewjpeg.ps    -c "${param}"  | 
					
Have fun !