apt-get install phpmyadmin
then edit your config file phpMyAdmin:
vim /etc/phpmyadmin/config.inc.php
and add the line:
$cfg['Servers'][$i]['AllowNoPassword'] = true;
then make a symbolic link for you to use phpMyAdmin by typing the url : http://myserver.com/phpmyadmin/
ln -s /usr/share/phpmyadmin /var/www/phpmyadmin
It works :)