Wordpress Multisite “Error establishing a database connection” in localhost

Question

When attempting to convert WordPress to a Multisite setup, I get the error:

Error establishing a database connection

I\'m using

Answer 1

Besides to all said above, if working with multisite environment please check also the following: in the respective subdirectories (/home/subsitename) there exist separate wp-config.php and .htaccess files for each of (sub)sites, so the above mentioned parameters have to be adjusted in all of these files. For example, my main site was working correctly since these files in my /home directory were OK, but when tried to access my sub-sites, I've been receiving database connection error message until I adjusted these files too.