Not Found The requested URL was not found on this server. Apache/2.4.38 (Debian) Server at localhost Port 8081 code example
Example: Not Found The requested URL was not found on this server. Apache/2.4.41 (Ubuntu) Server at localhost Port 80
sudo ln -s /etc/phpmyadmin/apache.conf /etc/apache2/conf-available/phpmyadmin.conf
sudo a2enconf phpmyadmin
sudo service apache2 restart