Concatenate all PDF files into one

sam2p

  • Raster (bitmap) image converter with smart PDF and PostScript (EPS) output.
    More information: <http://pts.50.hu/sam2p/>.
  • Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

sam2p *.pdf {{path/to/output.pdf}}

click the source code to copy install sam2p on any operating system with command-not-found.com