img-ppm(3tk) on Linux
The text 45a75df7e421, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Img, Portable Pixmap format (ppm)
Flags it lists
-
-ascii -
-gamma -
-max -
-min -
-scanorder -
-verbose