WordPress Speed Up Service | WordPress Website Maintenance Packages db_user and wp_user – how does it work?, by hanske72 Problem: Upload and plugin-install-issues Server: I have WordPress 4.8.3 installed on my Amazon EC server with Ubuntu. History: Ever since the installation I have ahd issues with user-rights. I am not able to install/update plugins and I cannot upload media. I have worked a lot with chown and chmod and have created a whole new user for my wordpress-installation. Included PKK-key for FTP-access. Today – what happened was that I set the rights of the upload-folder to 777 and then uploaded content. I then saw that the user of those files was my db_user!? There are 4 “users” to a WordPress-installation. 1. The wordpress-user I use to log in (standard name – admin) 2. DB-user 3. Ubuntu-user 4. www-data (I am not sure this is a user, but the owner of my www is now this…. In wp-config.php I have set database user to DB-user and FTP-user to Ubuntu-user. I have set most files to 755 with www-data:www-data. Basically my question is – how does all this work? And who is who? And finally what do I do to make it all OK? db_user and wp_user – how does it work?