phpmyadmin #1698 - Access denied for user 'root'@'localhost' code example
Example: Got error: 1698: Access denied for user 'root'@'localhost' when trying to connect
$ sudo mysql -u root # I had to use "sudo" since is new installation
mysql> USE mysql;
mysql> UPDATE user SET plugin='mysql_native_password' WHERE User='root';
mysql> FLUSH PRIVILEGES;
mysql> exit;
$ service mysql restart