Wordpress Plugin Installation - Failed to connect to FTP Server - Safest Solution?

Question

I succesfully set up a VPS LEMP-stack with Wordpress. When I am trying to install plugins from the WP backend, I am prompted with the following message:

To perfo         


        

Answer 1

I don't know if it is the safest method or not. But pasting this code in wp-config.php once solved my problem:

define('FS_METHOD', 'direct');