shred(1) on Linux
The text 25483a088db5, as Debian 3.1 (Sarge) shipped it.
delete a file securely, first overwriting it to hide its contents
Flags it lists
-
--exact -
--force -
--help -
--iterations -
--remove -
--size -
--verbose -
--version -
--zero -
-f -
-n -
-s -
-u -
-v -
-x -
-z