tldr/pages/linux/gs.md

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# gs
> GhostScript is a PDF and PostScript interpreter.
- To view a file:
`gs -dQUIET -dBATCH {{file.pdf}}`
- Reduce PDF file size to 150 dpi images for reading on a ebook 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}}`