PhpMyAdmin

\phpMyAdmin\libraries\donfig.default.php

$cfg['ExecTimeLimit'] = 300;

1.etc/apache2/conf-available/phpmyadmin.conf
2. Order Deny,Allow
   Deny from all
   Allow from 192.168.1.0/24
3.service apache2 reload

https://www.bauer-power.net/2012/10/hide-phpmyadmin-and-restrict-access-by.html#.Xm7fUagzZPY

ALTER TABLE `orders` auto_increment = 10

/root/.digitalocean_password

Extra password
find dir where users with hashed passwords
/usr/share/phpmyadmin/.htaccess
nano .htaccess
AuthUserFile /etc/phpmyadmin/.htpasswd

Create the .htpasswd file for Authentication

1. create user:
sudo htpasswd -c /etc/phpmyadmin/.htpasswd username

1. create additional user:
sudo htpasswd /etc/phpmyadmin/.htpasswd additionaluser

2. enter password

https://www.digitalocean.com/community/tutorials/how-to-install-and-secure-phpmyadmin-on-ubuntu-16-04