执行sudo mysql_secure_installation. sh命令后。

2 .执行sudo mysql命令，进入“mysql”界面。 运行SELECT user,authentication_string,plugin,host FROM mysql.user;检查root用户是否有插件auth_socket。 然后运行卸载插件validate_password;在运行之前删除特权 this ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

注意:查看这个链接https://www.digitalocean.com/community/tutorials/how-to-install-mysql-on-ubuntu-18-04以获得更多帮助

如果你不关心密码策略。你可以通过下面的mysql命令将其设置为LOW:

mysql> SET GLOBAL validate_password.length = 4;
mysql> SET GLOBAL validate_password.policy=LOW;

对于MySQL 8，你可以使用下面的脚本:

SET GLOBAL validate_password.LENGTH = 4;
SET GLOBAL validate_password.policy = 0;
SET GLOBAL validate_password.mixed_case_count = 0;
SET GLOBAL validate_password.number_count = 0;
SET GLOBAL validate_password.special_char_count = 0;
SET GLOBAL validate_password.check_user_name = 0;
ALTER USER 'user'@'localhost' IDENTIFIED BY 'pass';
FLUSH PRIVILEGES;

对于Laravel用户在MySQL 8.0中遇到此问题。x,添加

'modes'=> [
             'ONLY_FULL_GROUP_BY',
             'STRICT_TRANS_TABLES',
             'NO_ZERO_IN_DATE',
             'NO_ZERO_DATE',
             'ERROR_FOR_DIVISION_BY_ZERO',
             'NO_ENGINE_SUBSTITUTION',
            ],

到你的database.php文件如下所示:

// database.php

    'connections' => [

        'mysql' => [
            'driver'      => 'mysql',
            'host'        => env( 'DB_HOST', '127.0.0.1' ),
            'port'        => env( 'DB_PORT', '3306' ),
            'database'    => env( 'DB_DATABASE', 'forge' ),
            'username'    => env( 'DB_USERNAME', 'forge' ),
            'password'    => env( 'DB_PASSWORD', '' ),
            'unix_socket' => env( 'DB_SOCKET', '' ),
            'charset'     => 'utf8mb4',
            'collation'   => 'utf8mb4_unicode_ci',
            'prefix'      => '',
            'strict'      => true,
            'engine'      => null,
            'modes'       => [
                'ONLY_FULL_GROUP_BY',
                'STRICT_TRANS_TABLES',
                'NO_ZERO_IN_DATE',
                'NO_ZERO_DATE',
                'ERROR_FOR_DIVISION_BY_ZERO',
                'NO_ENGINE_SUBSTITUTION',
            ],
        ],
    ],

它帮我解决了问题。

对我来说，在ubuntu新安装的mysqld上不起作用，必须添加这个:到/etc/mysql/mysql.conf.d/mysqld.cnf，否则服务器不会启动(猜测插件没有在正确的时间加载，当我只是添加它而没有plugin-load-add指令时)

plugin-load-add=validate_password.so
validate_password_policy=LOW
validate_password_length=8
validate_password_mixed_case_count=0
validate_password_number_count=0
validate_password_special_char_count=0

执行sudo mysql_secure_installation. sh命令后。

2 .执行sudo mysql命令，进入“mysql”界面。 运行SELECT user,authentication_string,plugin,host FROM mysql.user;检查root用户是否有插件auth_socket。 然后运行卸载插件validate_password;在运行之前删除特权 this ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

注意:查看这个链接https://www.digitalocean.com/community/tutorials/how-to-install-mysql-on-ubuntu-18-04以获得更多帮助