pnmscalefixed(1) on Linux
The text 3e0b293483cd, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
scale a PNM file quickly
Flags it lists
-
-height -
-pixels -
-reduce -
-verbose -
-width -
-xscale -
-xsize -
-xysize -
-yscale -
-ysize