pdfjoin(1) on Linux
The text 0081fdb76ea9, as Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
concatenate the multiple PDF files into a single file
Flags it lists
-
--fitpaper -
--noautoscale -
--offset -
--orient -
--outfile -
--paper -
--tidy -
--trim