rngd(8) on Linux
The text 835ec257226c, as Debian 13 (Trixie) shipped it.
Check and feed random data from hardware device to kernel random device
Flags it lists
-
--background -
--foreground -
--help -
--quiet -
--verbose -
--version -
-? -
-V -
-b -
-f -
-q -
-v