问题
I have installed MariaDB on Ubuntu LTS 16.04. Then I have run
/usr/bin/mysql_secure_installation
and set a root password. Accessing the DB via mysql -u root -p works fine. But checking the status with service mysql status opens a log file with this warning:
[Warning] 'user' entry 'root@localhost' has both a password and an authentication plugin specified. The password will be ignored.
The questions are:
- Is this a worry or completely normal?
- If this is a worry, how can I fix it?
回答1:
It is normal, if by saying "accessing the DB via mysql -u root -p works fine" you mean that you are running it while being a system root (or under sudo). You should not be able to do it as an ordinary user.
Packages generated by Ubuntu by default have unix_socket authentication for the local root. To check, run
SELECT user, host, plugin FROM mysql.user;
You should see unix_socket in the plugin column for root@localhost.
If you want to use the password authentication instead, run
UPDATE mysql.user SET plugin = '' WHERE plugin = 'unix_socket';
FLUSH PRIVILEGES;
来源：https://stackoverflow.com/questions/43439111/mariadb-warning-rootlocalhost-has-both-the-password-will-be-ignored