这一部分没有太多可以说的内容，直接列代码：

[root@mysql-manager ~]# cat /etc/my.cnf | grep --color log-error
log-error=/var/lib/mysql/log_data/mysql-error.log
[root@mysql-manager ~]# 
[root@mysql-manager ~]# cat /var/lib/mysql/log_data/mysql-error.log  | grep "A temporary password"
2017-02-21T08:23:22.195412Z 1 [Note] A temporary password is generated for root@localhost: sd:Fy-w 
mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> 
mysql> set password = password('Abcd1@34');
Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| ndbinfo            |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

mysql> exit
Bye
[root@mysql-manager ~]# mysql -u root -p'sd:Fy-w exit
Bye
[root@mysql-manager ~]#

——————————————
Done。