Discussion on: Embedded Elixir (without Nerves)

HOME: Again, not specific to Erlang, but Erlang tries to save a cookie file in the home dir for some reason.

The reason for this cookie existence is to allow to run distributed Erlang/Elixir. So the cookie will be used to allow nodes to talk with each other.

You can read more here, where at some point you will read:

First of all, you need to ensure all machines have a ~/.erlang.cookie file with exactly the same value.