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方式一#xff1a;
方式二#xff1a;
2.1 也可以像我这样#xff0c;普通用户登录进去后
2.2 执行如下命令#xff0c;将已知的user1的加密密文更新到root中
2.3 查询数据库
2.4 用root用户登录
2.5 登录正常#xff0c;但这会root登录进去后#xff0c;无法…目录
方式一
方式二
2.1 也可以像我这样普通用户登录进去后
2.2 执行如下命令将已知的user1的加密密文更新到root中
2.3 查询数据库
2.4 用root用户登录
2.5 登录正常但这会root登录进去后无法执行具体的sql只要有操作会报如下的错
2.6 需要重新ALTRE下用户信息
2.7 退不退出没关系在重新执行sql命令时已显示正常 时间久了root密码已遗忘只要普通用户的密码记得。
不幸中的幸运是创建普通用户时赋予普通用户的权限足够大。不然就得更改数据库配置配置文件末尾添加skip-grant-tables属性修改了。那比较麻烦网络上也有很多博客介绍
方式一
停数据库服务修改mysql.cnf文件添加属性skip-grant-tables启动数据库root免密登陆此时alter user rootlocalhost IDENTIFIED BY xxxxx ;更新root用户密码停mysql服务修改mysql.cnf文件去掉属性skip-grant-tables启动mysql服务。
root密码修改完成。
方式二
2.1 也可以像我这样普通用户登录进去后
SELECT Host, User,authentication_string FROM mysql.user ;
---------------------------------------------------------------------
| Host | User | authentication_string |
---------------------------------------------------------------------
| localhost | root | *1B3C2E06495E4EA09B0212594330B69A3FF6330B |
| localhost | mysql.session | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| localhost | mysql.sys | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| % | user1 | *BE707F4785F1FD02DCF2BF85AED55095BE461D94 |
| % | user2 | *BE707F4785F1FD02DCF2BF85AED55095BE461D94 |
---------------------------------------------------------------------
2.2 执行如下命令将已知的user1的加密密文更新到root中
# UPDATE mysql.user SET authentication_string*BE707F4785F1FD02DCF2BF85AED55095BE461D94 WHERE Userroot;
# FLUSH PRIVILEGES;
2.3 查询数据库
mysql SELECT Host, User,authentication_string FROM mysql.user ;
---------------------------------------------------------------------
| Host | User | authentication_string |
---------------------------------------------------------------------
| localhost | root | *BE707F4785F1FD02DCF2BF85AED55095BE461D94 |
| localhost | mysql.session | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| localhost | mysql.sys | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| % | user1 | *BE707F4785F1FD02DCF2BF85AED55095BE461D94 |
| % | user2 | *BE707F4785F1FD02DCF2BF85AED55095BE461D94 |
---------------------------------------------------------------------2.4 用root用户登录 2.5 登录正常但这会root登录进去后无法执行具体的sql只要有操作会报如下的错
mysql SELECT Host, User,authentication_string FROM mysql.user ;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql SELECT * FROM mysql.user ;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
2.6 需要重新ALTRE下用户信息
mysql shwo databases;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near shwo databases at line 1
mysql show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql alter user rootlocalhost IDENTIFIED BY 嘻嘻嘻嘻嘻嘻嘻嘻 ;
Query OK, 0 rows affected (0.03 sec)mysql commit;
Query OK, 0 rows affected (0.00 sec)mysql FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
2.7 退不退出没关系在重新执行sql命令时已显示正常
# mysql -h localhost -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 156907
Server version: 5.7.24 MySQL Community Server (GPL)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 show databases;
--------------------
| Database |
--------------------
| information_schema |
| finance |
| mysql |
| performance_schema |
| sys |
--------------------
5 rows in set (0.00 sec)
