Why can't we say 'recue exception => e'?

Exception is the root of the exception structure of ruby, so acceptException will retrieve all exceptions.

Here, the target to be recorded is from the user's ctrl+c

It includes SyntaxError, LoadError, and Interrupt.

You said you wanted to stop the server when you wanted it, but you can't stop it.

I think you asked me to log, but then you can use resue Standard Error.

begin
  # # iceberg!
rescue => e
  # # lifeboats
end

begin
  # # iceberg!
rescue StandardError => e
  # # lifeboats
end

You can use either of the two.