erl -setcookie my_cookie
Sometimes it is common to write
erl -cookie my_cookie % wrong, use setcooke, not cookie
erl --setcookie my_cookie % wrong, use only 1 dash
erl -setcookie=my_cookie % wrong, do not use an equals sign
What does the shell think the cookie value is ?
Try
1> erlang:get_cookie().
Is the value returned the same as the value as you intended to use for the cookie ? If not, check the common mistakes above.
net_adm:ping fails:
Did you specify the remote node name as an atom ?
e.g. try 'a@localhost' instead of a@localhost
