mFixNaN(1) on Linux
The text 84e99aa43df1, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster) shipped it. The page shows this text now.
Replace a particular set of values in a FITS image with NaNs (or vice-versa)
Flags it lists
-
-b -
-d -
-v