card(1) on Linux
The text 899588786a6f, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
print reference card of program options
Flags it lists
-
--command -
--help -
--language -
--output -
--version -
-h -
-l -
-o -
-v