对于新Linux用户来说，这可能是一项艰巨的任务。让我用MySQL 8更新这个(目前可用的最新版本是8.0.12，截至2018-09-12)

Open "mysqld.cnf" configuration file at "/etc/mysql/mysql.conf.d/". Add skip-grant-tables to the next line of [mysql] text and save. Restart the MySQL service as "sudo service mysql restart". Now your MySQL is free of any authentication. Connect to the MySQL client (also known as mysql-shell) as mysql -u root -p. There is no password to be keyed in as of now. Run SQL command flush privileges; Reset the password now as ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPassword'; Now let's get back to the normal state; remove that line "skip-grant-tables" from "mysqld.cnf" and restart the service.

就是这样。

使用sudo修改密码:

sudo mysql

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'insert_password';

来源:Phoenixnap -拒绝访问用户根localhost

在尝试了所有其他答案后，这是最后对我有用的:

sudo mysql -- It does not ask me for any password

-- Then in MariaDB/MySQL console:
update mysql.user set plugin = 'mysql_native_password' where User='root';
FLUSH PRIVILEGES;
exit;

我发现答案在博客文章解决:错误“访问拒绝用户' root ' @ ' localhost '”的MySQL - codementor。科技(媒介)。

窗口:

cd \ampps\mysql\bin ：

mysql.exe -u root -pmysql

mysql启动后(可以看到shell是这样的mysql>) 使用这个查询:

 ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';

请再次使用root访问

我找到的所有解决方案都比必要的要复杂得多，没有一个适合我。这是解决我问题的办法。不需要重新启动mysqld或使用特殊权限启动它。

sudo mysql

-- for MySQL
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';

-- for MariaDB
ALTER USER 'root'@'localhost' IDENTIFIED VIA mysql_native_password USING PASSWORD('root');

通过一个查询，我们将auth_plugin更改为mysql_native_password，并将根密码设置为root(可以在查询中随意更改)。

现在您应该可以使用root登录了。更多信息可以在MySQL文档或MariaDB文档中找到。

(使用Ctrl + D或输入Exit退出MySQL控制台。)

我试图利用Mac上的Docker桌面来运行5.7.35和这个Docker -compose。Yml配置允许它工作:

特别是这一行…

命令:default-authentication-plugin = mysql_native_password

.．.这招奏效了

version: '3.3'
services:
  mysql_db:
    image: mysql:5.7
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: 'your_password'
    ports:
      - '3306:3306'
    expose:
      - '3306'
    volumes:
      - ~/your/volume/path:/var/lib/mysql