1. From terminal: erl -mnesia dir '"/home/user/dir/to/GGS/GameDB.Player"'
2. mnesia:create_schema([node()]).
3. mnesia:start().
4. c(gamedb).
5. gamedb:init().
6. mnesia:info().
7. gamedb:test_player().

Last output should be: 
 Player name: Tux
 {atomic,ok}