srm(1) on Linux
The text 8ee856cc2a16, as Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
secure remove (secure_deletion toolkit)
Flags it lists
-
-d -
-f -
-l -
-r -
-v -
-z