如果你不记得密码，@radtek的答案对我来说是有效的，除了在我的情况下，我已经使用brew设置了MySQL，这意味着他的答案的第1步和第2步必须更改为:

/usr/local/bin/mysql.服务器停止 /usr/local/bin/mysqld_safe——skip-grant-tables

注意:缺少sudo。

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。

我用以下方法解决了这个问题:

关闭MySQL服务器:MySQL。服务器停止 以安全模式运行MySQL: mysqld_safe——skip-grant-tables 在另一个终端，使用mysql -u root登录 在同一终端上运行UPDATE mysql。SET authentication_string=null WHERE user ='root';然后用exit退出; 使用mysql停止安全模式服务器。服务器停止后再正常启动;mysql。服务器启动

现在您可以使用

ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'yourpasswd';

MySQL 8

关闭MySQL服务器

进入系统首选项-> MySQL 单击停止MySQL服务器按钮

打开两个终端[命令行]窗口 在第一个终端窗口中运行以下命令:

mysqld_safe --skip-grant-tables

在第二个终端窗口中执行以下操作:

4.1. 登录MySQL

mysql -u root

4.2. 在MySQL提示符中执行如下命令:

FLUSH PRIVILEGES;
ALTER USER 'root'@'localhost' IDENTIFIED BY 'NEWPASSWORD';

4.3. 退出MySQL

exit;

回到第一个终端窗口并关闭mysqld_safe

5.1. 按CTRL + Z

5.2. 运行以下命令

mysqladmin -u root -p shutdown

5.3. 输入在4.2中设置的新密码。当提示。

启动MySQL服务器[见1.]

停止mysqld服务器。

Mac OS X:系统首选项→MySQL→停止MySQL服务器 Linux(从终端):sudo systemctl停止mysqld.service

Start the server in safe mode with privilege bypass From Terminal: sudo /usr/local/mysql/bin/mysqld_safe --skip-grant-tables In a new terminal window: sudo /usr/local/mysql/bin/mysql -u root This will open the MySQL command-line client. From here enter: UPDATE mysql.user SET authentication_string=PASSWORD('NewPassword') WHERE User='root'; FLUSH PRIVILEGES; quit Stop the mysqld server again and restart it in normal mode. Mac OS X (From Terminal): sudo /usr/local/mysql/support-files/mysql.server restart Linux Terminal: sudo systemctl restart mysqld

之前的评论都没有解决我的Mac上的问题。

我使用下面的命令，它工作。

brew services stop mysql
pkill mysqld
rm -rf /usr/local/var/mysql/ # NOTE: this will delete your existing database!!!
brew postinstall mysql
brew services restart mysql
mysql -u root