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

/etc/apache2/apache.conf

1. Add the following line to the end of of file /etc/apache2/apache2.conf:
   Include /etc/phpmyadmin/apache.conf
2. Restart Apache by giving this command on the command line:
   sudo /etc/init.d/apache2 restart

http://stackoverflow.com/questions/6893799/phpmyadmin-is-not-working-after-i-installed-it

https://help.ubuntu.com/community/phpMyAdmin