gs

GhostScript is a PDF and PostScript interpreter. More information: https://manned.org/gs.

To view a file:
gs -dQUIET -dBATCH {{file.pdf}}
Reduce PDF file size to 150 dpi images for reading on a e-book device:
gs -dNOPAUSE -dQUIET -dBATCH -sDEVICE=pdfwrite -dPDFSETTINGS=/ebook -sOutputFile={{output.pdf}} {{input.pdf}}
Convert PDF file (pages 1 through 3) to an image with 150 dpi resolution:
gs -dQUIET -dBATCH -dNOPAUSE -sDEVICE=jpeg -r150 -dFirstPage={{1}} -dLastPage={{3}} -sOutputFile={{output_%d.jpg}} {{input.pdf}}
Extract pages from a PDF file:
gs -dQUIET -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile={{output.pdf}} {{input.pdf}}
Merge PDF files:
gs -dQUIET -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile={{output.pdf}} {{input1.pdf}} {{input2.pdf}}
Convert from PostScript file to PDF file:
gs -dQUIET -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile={{output.pdf}} {{input.ps}}

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