hexcurse(1) on Linux
The text a53e903a6244, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
an ncurses-based hex editor
Flags it lists
-
-? -
-a -
-help