GeoidEval(1) on Linux
The text 6fcbe2322f9a, as Debian 7 (Wheezy) shipped it.
Flags it lists
-
--comment-delimiter -
--haetomsl -
--help -
--input-file -
--input-string -
--line-separator -
--msltohae -
--output-file -
--version -
-a -
-c -
-d -
-g -
-h -
-l -
-n -
-v -
-z