Wordpress : Fix FTP credentials to install plugins or update theme or plugins on localhost host

Solutions:
Add this line into wp-config.php (any location)

define('FS_METHOD', 'direct');


Source:

• https://phpsmashcode.com/tips-and-tricks/fix-wordpress-asking-ftp-credentials-to-install-plugins-on-localhost-ubuntumac#.WmQ5M5P1Wb8