[ubuntu] 16.04 MariaDB -> Error in syslog (mysqlcheck)

Code:

May 14 12:00:13 fortuna /etc/mysql/debian-start[1466]: /usr/bin/mysql_upgrade: the '--basedir' option is always ignored
May 14 12:00:13 fortuna /etc/mysql/debian-start[1466]: Looking for 'mysql' as: /usr/bin/mysql
May 14 12:00:13 fortuna /etc/mysql/debian-start[1466]: Looking for 'mysqlcheck' as: /usr/bin/mysqlcheck
May 14 12:00:13 fortuna /etc/mysql/debian-start[1466]: Version check failed. Got the following error when calling the 'mysql' command line client
May 14 12:00:13 fortuna /etc/mysql/debian-start[1466]: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
May 14 12:00:13 fortuna /etc/mysql/debian-start[1466]: FATAL ERROR: Upgrade failed
May 14 12:00:13 fortuna /etc/mysql/debian-start[1487]: Checking for insecure root accounts.
May 14 12:00:13 fortuna mysql[1020]: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

Code:

root@fortuna:~# mysql
Welcome to the MariaDB monitor.  Commands end with ; or g.
Your MariaDB coection id is 7071
Server version: 10.0.24-MariaDB-7 Ubuntu 16.04


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