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I came across an interesting behavior that helped me learn something about MySQL (MariaDB to be precise) authentication. In this WILT blog I will talk about the “unix socket” authentication plugin in MySQL/MariaDB. The steps shown in this blog have been tried on Ubuntu 16.04 and MariaDB Server 10. MariaDB Install and root user In some earlier versions of MySQL as well as MariaDB server, the installation process required you to enter password for root user.