/etc/cron.daily/logrotate:
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'
error: error running shared postrotate script for '/var/log/mysql/mysql.log /var/log/mysql/mysql-slow.log /var/log/mysql/mariadb-slow.log /var/log/mysql/error.log '
run-parts: /etc/cron.daily/logrotate exited with return code 1

[mysqladmin]
password = *mypassword*
user = root

[mysql]
password = *mypassword*

test -x /usr/bin/mysqladmin || exit 0
if [ -f `my_print_defaults --mysqld | grep -oP "pid-file=K[^$]+"` ]; then
    # If this fails, check debian.conf!
    mysqladmin --defaults-file=/etc/mysql/debian.cnf flush-logs
fi

# logrotate -f /etc/logrotate.d/mysql-server
error: skipping "/var/log/mysql.log" because parent directory has insecure
permissions (It's world writable or writable by group which is not "root")
Set "su" directive in config file to tell logrotate which user/group should
be used for rotation.

su root syslog

/var/log/mysql.log /var/log/mysql/mysql.log /var/log/mysql/mysql-slow.log /var/log/mysql/error.log {