Shell-printing printing by a shell command

Command	Description
lpr	print a document
lpr -P np2	print a document in the trailer
psnup	resize to 2 or more pages in one
psresize	change size of a ps file
ps2pdf	convert a ps file into a pdf file
pdf2ps	convert a pdf file into a ps file

More on printing commands on the typesetting and shell commands sections: §9.9, §9.4