我刚刚在Mac OS x上安装了MySQL,下一步是设置root用户密码,所以我接下来这样做:

启动终端应用程序以访问Unix命令行。 在Unix提示符下,我执行了以下命令: cd /usr/local/mysql/bin ./mysqladmin -u root password' password'

但是,当我执行命令时

./mysql -u root,这是答案:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 224
Server version: 5.5.13 MySQL Community Server (GPL)

Copyright (c) 2000, 2010, 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>

我不需要密码就能进入mysql命令行!

为什么会这样?


当前回答

现有答案中提到的方法不适用于MySQL 5.7.6或更高版本。根据MySQL文档,这是推荐的方法。

B.5.3.2.3重置Root用户密码:通用说明

MySQL 5.7.6及以上版本:

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

参考:https://dev.mysql.com/doc/refman/5.7/en/resetting-permissions.html

其他回答

当您登录MySQL终端时,请尝试执行FLUSH PRIVILEGES命令。如果这不起作用,请在MySQL终端中尝试以下命令集

mysql -u root

mysql> USE mysql;
mysql> UPDATE user SET password=PASSWORD("NEWPASSWORD") WHERE User='root';
mysql> FLUSH PRIVILEGES;
mysql> quit

用你想要的任何密码更改NEWPASSWORD。应该都准备好了!

更新:从MySQL 5.7开始,密码字段被重命名为authentication_string。修改密码时,使用以下查询来修改密码。所有其他命令保持不变:

mysql> UPDATE user SET authentication_string=PASSWORD("NEWPASSWORD") WHERE User='root';

请不要使用MySQL 8.0+

mysql> UPDATE mysql.user SET authentication_string='password' WHERE User='root'; 

因为它覆盖了authentication_string,它应该是一个哈希而不是纯文本,而是使用:

mysql> `ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';` 

您可以手动关闭Mac上的MySQL,通过点击Apple菜单并打开系统首选项。选择“MySQL”首选项面板,然后点击“停止MySQL服务器”按钮停止Mac上的MySQL服务器。

停止MySQL后,需要执行以下步骤。

你需要在skip-grant-tables模式下启动MySQL sudo /usr/local/mysql/support-files / mysql。服务器启动——skip-grant-tables 在您的终端中,输入此命令以刷新现有权限 /usr/local/mysql/bin/mysql 现在需要修改用户密码 mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'newpassword' mysql >退出

然后,您可以转到Apple菜单并打开系统首选项。选择“MySQL”首选项面板,然后点击“停止MySQL服务器”按钮来停止Mac上的MySQL服务器。

最后,您可以再次进入Apple菜单并打开系统首选项。选择“MySQL”首选项面板,然后单击“启动MySQL服务器”按钮启动Mac上的MySQL服务器。

在终端试试这个:

/usr/local/bin/mysql_secure_installation

如果您不记得设置的root密码,需要重置密码,请执行以下步骤:

Stop the mysqld server, this varies per install Run the server in safe mode with privilege bypass sudo mysqld_safe --skip-grant-tables; In a new window connect to the database, set a new password and flush the permissions & quit: mysql -u root For MySQL older than MySQL 5.7 use: UPDATE mysql.user SET Password=PASSWORD('your-password') WHERE User='root'; For MySQL 5.7+ use: USE mysql; UPDATE mysql.user SET authentication_string=PASSWORD("your-password") WHERE User='root'; Refresh and quit: FLUSH PRIVILEGES; \q Stop the safe mode server and start your regular server back. The new password should work now. It worked like a charm for me :)


Note

运行 更新mysql。SET authentication_string=null WHERE user ='root'; 如果您不想为root用户设置密码。或者PASSWORD()函数不适合您。

这就是对我有效的方法:

Make sure no other MySQL process is running. To check this do the following: From the terminal, run this command: lsof -i:3306 If any PID is returned, kill it using kill -9 PID Go to System Preferences → MySQL → check if any MySQL instances are running, stop them. Start MySQL with the command: sudo /usr/local/mysql/bin/mysqld_safe --skip-grant-tables The password for every user is stored in the mysql.user table under columns User and authentication_string respectively. We can update the table as: UPDATE mysql.user SET authentication_string='your_password' where User='root'