Error Establishing a Database Connection in WordPress with Ubuntu 16.04.3 NGINX, MARIADB 10, PHP7/7.1 and Wordpress 4.8.2

When I create a new Ubuntu 16.04.3 droplet and I install NGINX, MARIADB and PHP (no matter which versions, all have the same problem) and WordPress I am getting the Error Establishing a Database Connection. Before this error I created +50 servers all the same and since a couple of days I am having this strange problem. Tried almost everything, so I am creating a support ticket for it. When I fill in the Database information (DBname, DBuser, DBpassword) I am getting directly Error Establishing a Database Connection. I am lost for the moment. Someone else with the same problem?

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Hello all,

If you’re unable to access the database using the credentials then the password is likely to be wrong. You can try to reset the passwords for the databases that you’re unable to access.

You can also check our article on How To Debug the WordPress “Error Establishing Database Connection”:

Regards, Alex

Have your created a database and user and tested that the connection works outside the scope of WordPress?

Here is a simple bash script to test the connection (adjust as needed)

#!/usr/bin/env bash


WPDBHOST=$(cat ${WEBROOT}/wp-config.php | grep DB_HOST | cut -d \' -f 4)
WPDBNAME=$(cat ${WEBROOT}/wp-config.php | grep DB_NAME | cut -d \' -f 4)
WPDBUSER=$(cat ${WEBROOT}/wp-config.php | grep DB_USER | cut -d \' -f 4)
WPDBPASS=$(cat ${WEBROOT}/wp-config.php | grep DB_PASSWORD | cut -d \' -f 4)
WPDBPREF=$(cat ${WEBROOT}/wp-config.php | grep "\$table_prefix" | cut -d \' -f 2);

if [ ! "`mysql -u${WPDBUSER} -p${WPDBPASS} -e 'SHOW DATABASES;' | grep ${WPDBNAME}`" == "${WPDBNAME}" ]; then
  echo "${WPDBNAME} connection failure for ${WPDBUSER}"
  echo "${WPDBNAME} connected"