Package: qpdf Version: 6.0.0-2 file:///usr/share/doc/qpdf/qpdf-manual.html#ref.invocation says "This makes it possible to easily combine all pages in a set of files with a command like qpdf --empty out.pdf --pages *.pdf --."
$ qpdf --empty out.pdf --pages *.pdf -- qpdf: insufficient arguments to --pages Usage: qpdf [options] infile outfile For detailed help, run qpdf --help
