Você precisa simplesmente remover o usuário anônimo.
No futuro, a execução de / usr / bin / mysql_secure_installation (Localização na instalação RPM) solicitará que você remova esses usuários anônimos.
By default, a MySQL installation has an anonymous user, allowing anyone to log into MySQL without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment.
Remove anonymous users? [Y/n] y ... Success!