ошибка The requested URL /phpmyadmin was not found on this server.

Should you get a 404 «Not Found» error when you point your browser to the location of phpMyAdmin (such as: http://localhost/phpmyadmin) this is likely caused by not checking the ‘Apache 2’ selection during installation. To redo the installation run the following:

 sudo dpkg-reconfigure -plow phpmyadmin

Then select Apache 2 for the webserver you wish to configure.

If this does not work, then you can do the following to include the phpMyadmin-shipped Apache configuration into Apache:

sudo ln -s /etc/phpmyadmin/apache.conf /etc/apache2/conf.d/phpmyadmin.conf
sudo /etc/init.d/apache2 reload