gbase(1) on Linux
The text 4a65398a9551, as Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
small numeric base converter
Flags it lists
-
--help -
--version -
-s