pdfjam --nup 2x1 --landscape input.pdf --outfile 2up.pdf (Graphical + Command Line) Perfect for non-technical users. Supports cut marks, creep compensation, and page sorting.
(Ubuntu/Debian):
sudo apt install pdfjam :
: multivalent.jar from oldversion.com or GitHub mirrors. imposition software open source
pdfjam --booklet true --paper a4paper --landscape input.pdf --outfile booklet.pdf : pdfjam --nup 2x1 --landscape input
pip install pygam :