按照如下设置

[root@hk ~]# vim /etc/my.cnf
#找到mysqld在之后添加
#skip-grant-tables



[root@hk ~]# service  mysqld  restart
Redirecting to /bin/systemctl restart mysqld.service
[root@hk ~]# mysql -u root

设置你的密码

mysql> update mysql.user set authentication_string=password('你的密码') where user='root' ;
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 1

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit;
Bye

正常登陆 登录后发现无法操作原因是密码太过于简单

[root@hk ~]# mysql -u root -p 
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.7.21

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 
mysql> show databases
    -> ;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> 


更改高安全级别密码

mysql> SET PASSWORD = PASSWORD('数字字母大写特殊字符');
Query OK, 0 rows affected, 1 warning (0.00 sec)

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

mysql> 

正常使用

分类: linux

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