You will need Ghostscript installed in your compter. Then just run the following command
gs -q -sPAPERSIZE=letter -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=out.pdf in1.pdf in2.pdf in3.pdf ...
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How to concatenate multiple PDF files into one
Posted on November 13, 2007 by asif
