Split (extract) pdf pages from larger document

pdfsplitr.sh

#!/bin/bash
# Usage ./pdfsplitr.sh inputfile.pdf outputfile.pdf pagenumber
# Example: ./pdfsplitr.sh myfile.pdf myotherfile.pdf 2
# http://viktorpetersson.com/2010/10/22/how-to-split-a-pdf-files-on-mac-and-linuxunix/

GS=$(which gs)

# Make sure Ghostscript is installed
if [[ $GS = "" ]]
then
    echo “Ghostscript is not installed”
    exit
fi

if [[ "$4" = "" ]]
then
    LASTPAGE=$3
else
    LASTPAGE=$4
fi

# Run the actual conversion.
$GS -sDEVICE=pdfwrite -q -dNOPAUSE -dBATCH -sOutputFile=$2 -dFirstPage=$3 -dLastPage=$LASTPAGE $1