~# gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=finished.pdf fileone.pdf filetwo.pdf gs............................starts the Ghostscript program -dBATCH.......................Exit after processing files -dNOPAUSE.....................no user confirmation -q............................no process messages -sDEVICE=pdfwrite.............PDF format -sOutputFile=finished.pdf.....specify output filename