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停止 MySQL 任务 net stop MySQL
mysqld 命令 mysqld –console –skip-grant-tables –shared-memory
无密码进入mysql mysql -u root
清空root 密码 UPDATE user SET authentication_string="" WHERE user=“root”;
另一个终端无密码进入
F:\MySQL\mysql-8.0.13-winx64\bin>mysql -u root
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection id is 7
…
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.
mysql> USE mysql;
Database changed
mysql> SELECT user, authentication_string FROM user;
+——————+————————————————————————+
| user | authentication_string|
+——————+————————————————————————+
| mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| mysql.session| $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| mysql.sys| $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| root | 123456|
+——————+————————————————————————+
4 rows in set (0.34 sec)
mysql> UPDATE user SET authentication_string=”” WHERE user=”root”;
Query OK, 1 row affected (0.20 sec)
Rows matched: 1Changed: 1Warnings: 0
mysql> SELECT user, authentication_string FROM user;
+——————+————————————————————————+
| user | authentication_string|
+——————+————————————————————————+
| mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| mysql.session| $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| mysql.sys| $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| root ||
+——————+————————————————————————+
4 rows in set (0.00 sec)
mysql> FLUSH privileges;
Query OK, 0 rows affected (0.10 sec)
mysql> quit;
Bye
停止 mysqld 任务，Ctrl+C 结束任务，或者直接关闭 运行 mysqld 的 cmd 终端。
需要先停止运行上述 mysqld 任务,否则报错
F:\MySQL\mysql-8.0.13-winx64\bin>net start mysql
MySQL 服务正在启动 .
MySQL 服务无法启动。服务没有报告任何错误。
请键入 NET HELPMSG 3534 以获得更多的帮助。
先停止上述 mysqld 任务
F:\MySQL\mysql-8.0.13-winx64\bin>net start mysql
MySQL 服务正在启动 …
MySQL 服务已经启动成功。
现在 mysql root 已经没有了密码
F:\MySQL\mysql-8.0.13-winx64\bin>mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.…
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>
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