Answer by Chris Lane Jones for The requested URL /phpmyadmin was not found on this server

On Ibrahim's answer, I used the nano in the terminal instead of gedit, cause I could not get gedit to work.

Root Terminal Steps

1. Paste in terminal, this will open in the terminal Nano editor:

   nano /etc/apache2/apache2.conf
   

2. Then add the following line to the end of the file:

   Include /etc/phpmyadmin/apache.conf
   

3. ctrl-o and ctrl-x to save and exit.

4. Then paste in terminal: restart apache:

   /etc/init.d/apache2 restart