bfbtester(1) on Linux
The text a4209ca4f264, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
Brute Force Binary Tester
Flags it lists
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-a -
-e -
-h -
-m -
-s -
-t -
-v