MySQL:如何重置或更改 MySQL 根密码?

如何更改 ubuntu 服务器中的 MySQL 根密码和用户名?在设置任何更改之前是否需要停止 mysql 服务?

我也有 phpmyadmin 设置，phpmyadmin 会自动更新吗?

解决方案

在 Ubuntu Linux 上设置/更改/重置 MySQL 根密码.在终端中输入以下几行.

1. 停止 MySQL 服务器:sudo/etc/init.d/mysql stop
2. 启动mysqld配置:sudo mysqld --skip-grant-tables &

在某些情况下，您必须先创建 /var/run/mysqld:

 sudo mkdir -v/var/run/mysqld &&须藤 chown mysql/var/run/mysqld

3. 以root身份登录MySQL:mysql -u root mysql
4. 将 YOURNEWPASSWORD 替换为您的新密码:

对于 MySQL <8.0

 更新mysql.user放密码 = PASSWORD('你的新密码')在哪里用户 = 'root';同花顺特权；出口;

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注意:在某些版本上，如果 password 列不存在，您可能需要尝试:
UPDATE user SET authentication_string=password('YOURNEWPASSWORD') WHERE user='root';

注意:此方法不被认为是最安全的密码重置方式，但确实有效.

对于 MySQL >= 8.0

ALTER USER 'root'@'localhost' IDENTIFIED BY 'YOURNEWPASSWORD';

参考文献:

1. 在 Ubuntu 上设置/更改/重置 MySQL 根密码Linux
2. 如何重置根密码 (v5.6)
3. 如何重置根密码 (v8.0)

How do I change the MySQL root password and username in ubuntu server? Do I need to stop the mysql service before setting any changes?

I have a phpmyadmin setup as well, will phpmyadmin get updated automatically?

解决方案

Set / change / reset the MySQL root password on Ubuntu Linux. Enter the following lines in your terminal.

1. Stop the MySQL Server: sudo /etc/init.d/mysql stop
2. Start the mysqld configuration: sudo mysqld --skip-grant-tables &

In some cases, you've to create the /var/run/mysqld first:

    sudo mkdir -v /var/run/mysqld && sudo chown mysql /var/run/mysqld

3. Login to MySQL as root: mysql -u root mysql
4. Replace YOURNEWPASSWORD with your new password:

For MySQL < 8.0

    UPDATE
      mysql.user
    SET
      Password = PASSWORD('YOURNEWPASSWORD')
    WHERE
      User = 'root';
    FLUSH PRIVILEGES;
    exit;

Note: on some versions, if password column doesn't exist, you may want to try:
UPDATE user SET authentication_string=password('YOURNEWPASSWORD') WHERE user='root';

Note: This method is not regarded as the most secure way of resetting the password, however, it works.

For MySQL >= 8.0

ALTER USER 'root'@'localhost' IDENTIFIED BY 'YOURNEWPASSWORD';

References:

1. Set / Change / Reset the MySQL root password on Ubuntu Linux
2. How to Reset the Root Password (v5.6)
3. How to Reset the Root Password (v8.0)