Xampp / Lampp Mysql доступ

Я устанавливаю на Ubuntu 16.04 LTE Xampp (lampp) все хорошо, это работает:

:~$ sudo /opt/lampp/lampp start
Starting XAMPP for Linux 5.6.20-0...
XAMPP: Starting Apache...already running.
XAMPP: Starting MySQL...ok.
XAMPP: Starting ProFTPD...already running.

:~$ sudo /opt/lampp/lampp status
Version: XAMPP for Linux 5.6.20-0
Apache is running.
MySQL is not running.
ProFTPD is running.

:~$ sudo service mysql start

:~$ sudo /opt/lampp/lampp status
Version: XAMPP for Linux 5.6.20-0
Apache is running.
MySQL is not running.
ProFTPD is running.

Но когда я хочу войти в Терминал, имеет mysql -u root:

ОШИБКА 1698 (28000): доступ запрещен для пользователя ‘root’ @ ‘localhost’

И если я использую sudo mysql -u root, все в порядке, я могу использовать mysql терминалом.

Но для Firefox Http: //127.0.01/phpmyadmin/ :

Welcome to phpMyAdmin

Error

MySQL said: Documentation
Cannot connect: invalid settings.
Connection for controluser as defined in your configuration failed.
phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server.