mysql 8.0版本下命令行mysqld –skip-gr

1. 进入cmd ,停止MySQL服务 net stop mysql

Microsoft Windows [版本 10.0.14393]
(c) 2016 Microsoft Corporation。保留所有权利。

C:\Users\Administrator>net stop mysql
MySQL 服务正在停止.
MySQL 服务已成功停止。


C:\Users\Administrator>

2. 输入： mysqld --console --skip-grant-tables --shared-memory

C:\Users\Administrator>mysqld --console --skip-grant-tables --shared-memory
2022-09-08T05:24:08.165351Z 0 [System] [MY-010116] [Server] D:\mysql\bin\mysqld.exe (mysqld 8.0.22) starting as process 6852
2022-09-08T05:24:08.167088Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2022-09-08T05:24:08.188808Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-09-08T05:24:09.406594Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-09-08T05:24:09.657486Z 0 [Warning] [MY-011311] [Server] Plugin mysqlx reported: 'All I/O interfaces are disabled, X Protocol won't be accessible'
2022-09-08T05:24:10.006858Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2022-09-08T05:24:10.008668Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2022-09-08T05:24:10.072437Z 0 [System] [MY-010931] [Server] D:\mysql\bin\mysqld.exe: ready for connections. Version: '8.0.22'  socket: ''  port: 0  MySQL Community Server - GPL.

另外开一个cmd，使用mysql直接无密登录 mysql -u root –p

C:\Users\Administrator>mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.22 MySQL Community Server - GPL

Copyright (c) 2000, 2020, 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>

修改密码：

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '你的密码';  
//报错

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql>

//解决方法
mysql> flush privileges;

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';
Query OK, 0 rows affected (0.07 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.02 sec)

mysql>

登录（发现成功了）

C:\Users\Administrator>mysql -u root -p
Enter password: ****
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.22 MySQL Community Server - GPL

Copyright (c) 2000, 2020, 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>