Wordpress Installation "Error establishing a database connection".

Hello I have had wordpress installed and working perfectly but today I found an error on my site saying “Error establishing a database connection” and on the wp-admin page I see this: http://i.imgur.com/Ktaurvh.png

I have had a look at this article: http://www.wpbeginner.com/wp-tutorials/how-to-fix-the-error-establishing-a-database-connection-in-wordpress/ but I don’t remember mysql database password…

I can’t even remember what I named it tho looking in my wp-config.php file I see:

define(‘DB_NAME’, ‘wordpress’); define(‘DB_USER’, ‘wordpress’);

I used a one click install and i can not remember if i set this or if its default.

Is myphpadmin down? can i check without the password? can I find the password.

I have root access. Droplet stats 512MB Ram - 20GB - SSD Disk - New York 3 - Ubuntu WordPress on 14.04

Looking in my /var/log/syslog this is all that’s there but it does seem to be today’s date.

Jun 18 06:39:01 ***sitename-censored*** CRON[13943]: (root) CMD (  [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))