You might be in the habit of just pressing up to get previous things you wrote in a console. If you’re used to ruby, this works in a rails console or irb session, too.
Today I learned how to make the elixir command-line shell thing remember what you wrote in the same way. It works for erlang 20.x and up. Add this line to your shell profile:
export ERL_AFLAGS="-kernel shell_history enabled"
🙂