Error establishing a database connection

Posted August 16, 2016 2.9k views
WordPressUbuntu 16.04

After getting the Wordpress successfully setup, I have uploaded a theme to /tmp/wordpress/wp-content/themes. However, the uploaded theme does not show up in my Wordpress.

Desperately trying different methods, I accidentally entered sudo cp -a /tmp/wordpress/. /var/www/html again in the command list. Afterwards the website is down, and will show Error establishing a database connection & HTTP 500 Error. The condition remains the same after switching off and on the server again.

Is there anyway to solve the problem? I didn’t backup and don’t want to setup everything again…

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3 answers

I followed every steps in “How To Install WordPress with LEMP on Ubuntu 16.04” and was successful.

Just after I messed with the FTP and commands that the site went down…

Hello all,

I will recommend you to check our article on How To Debug the WordPress “Error Establishing Database Connection”:


by Brian Boucheron
WordPress is one of the most popular open source content management systems in the world. Although it started out focused on blogging, over the years it has developed into a more flexible platform for websites in general. After almost fifteen years of development it is quite polished and robust, yet issues can still come up. If you've recently attempted to load your WordPress-powered website and instead saw a message stating "Error Establishing Database Connection", the cause is most often...