problem with controllerMap in yii2

[font="Tahoma"] [size="3"]Hi

I wanted use ControllerMap in yii2.I writed below code in my [color="#FF0000"]main.php[/color] config file:

[color="#FF0000"]‘controllerMap’ => [

    	'article' => [


        	'class' => 'backend\controllers\PostController',


        	'enableCsrfValidation' => false,


     	],


	],[/color]

then I went to terminal for Ubuntu and then writed command of [color="#FF0000"]symlink of ln -s post/ article[/color]

,But when I used article controller instead of post controller,the error is occurred.

Please tell to me,how to use from ControllerMap in yii2 with example?[/size]

[/font]

Please answer to my question?