def system(command, *args)
      identifier = extract_identifier!(args)
      args = [identifier, :exec, command, *args].compact
      rvm(*args).successful?
    end
def system(command, *args)
      identifier = extract_identifier!(args)
      args = [identifier, :exec, command, *args].compact
      rvm(*args).successful?
    end
Like Kernel.system, but evaluates it within the environment.
 Also note that it doesn't support redirection etc.