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       shell_default - Customizing the Erlang environment.


       The  functions  in  this  module  are  called  when no module name is specified in a shell

       Consider the following shell dialog:

       1> lists:reverse("abc").
       2> c(foo).
       {ok, foo}

       In command one, module lists is called. In command two, no module name is  specified.  The
       shell searches module user_default followed by module shell_default for function c/1.

       shell_default  is  intended for "system wide" customizations to the shell. user_default is
       intended for "local" or individual user customizations.


       To add your own commands to the shell, create a module called  user_default  and  add  the
       commands  you  want. Then add the following line as the first line in your .erlang file in
       your home directory.


       $PATH is the directory where your user_default module can be found.