I want to make a new pdf from my old one: put portrait pages 1 & 2 on a landscape page 1, pages 3 & 4 on page 2, and so on.
Preview.app does this, but I need to do it in the shell.
jPDFtweak.jar also does this in GUI, but for no reason it fails to do it in terminal (for some of my files).
I do not know, how to use
lp to print to pdf.