Solution:
step1: Create a link in /var/www like this:step2:sudo ln -s /usr/share/phpmyadmin /var/www/
step3:Note: since 14.04 you may want to use /var/www/html/ instead of /var/www/
step4:If that’s not working for you, you need to include PHPMyAdmin inside apache configuration.
step5: Open apache.conf using your favorite editor, mine is vim 🙂
step6: sudo nano /etc/apache2/apache2.conf
step7: Then add the following line:
Include /etc/phpmyadmin/apache.conf
 For Ubuntu 15.04 and 16.04
   sudo ln -s /etc/phpmyadmin/apache.conf /etc/apache2/conf-available/phpmyadmin.conf
   sudo a2enconf phpmyadmin.conf
   sudo service apache2 reload
   sudo servive apache2 restart