rngd(8) on Linux
The text 505e40a5f12d, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
Check and feed random data from hardware device to kernel entropy pool
Flags it lists
-
--background -
--foreground -
--help -
--timeout -
--trng -
--version -
-? -
-V -
-b -
-f