[Inkscape] Convert from RGB to CMYK

inkscape_convert_to_cmyk.sh

#!/bin/bash
# http://zeroset.mnim.org/2014/07/14/save-a-pdf-to-cmyk-with-inkscape/
# usage
# inkscape_convert_to_cmyk.sh /path/to/input_rgb.pdf /path/to/output_cmyk.pdf
gs -dSAFER -dBATCH -dNOPAUSE -dNOCACHE \
    -sDEVICE=pdfwrite \
    -sColorConversionStrategy=CMYK \
    -dProcessColorModel=/DeviceCMYK \
    -sOutputFile=$2 \
    $1

Step1: Create a new RGB pdf with inkscape e.g. rgb.pdf
Step2: Run the script e.g. sh inkscape_convert_to_cmyk.sh rgb.pdf cmyk.pdf