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  • MySQL 8.0 以上版本重置 root 用户密码的终极办法

    1. 在 /etc/my.cnf 文件末尾追加 skip-grant-tables

     [root@abdefg mysql]# vim /etc/my.cnf
     [mysql]
     # 设置mysql客户端默认字符集
     default-character-set=utf8mb4 
     
     [mysqld]
     # 设置3306端口
     port = 3306 
     # 设置mysql的安装目录
     basedir=/usr/local/mysql
     # 设置mysql数据库的数据的存放目录
     datadir=/usr/local/mysql/data
     # 允许最大连接数
     max_connections=200
     # 服务端默认编码(数据库级别)
     character-set-server=utf8mb4
     # 创建新表时将使用的默认存储引擎
     default-storage-engine=INNODB 
     lower_case_table_names=1
     max_allowed_packet=16M
    skip
    -grant-tables

    2.重启MySQL服务

    service mysqld restart

    3.免密码登录 root 用户(输入密码时直接回车即可)

    [root@abdefg bin]# mysql -uroot -p
     Enter password: 
     Welcome to the MySQL monitor.  Commands end with ; or g.
     Your MySQL connection id is 8
     Server version: 8.0.13 MySQL Community Server - GPL
     
     Copyright (c) 2000, 2018, 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>

    4.重置密码

    mysql> use mysql
    mysql> select host, user, authentication_string, plugin from user;

    注意:先执行flush privileges;然后会alter成功,要不然会alter失败

    mysql> alter user 'root'@'localhost'IDENTIFIED BY 'newpassword';

    5. 修改密码安全级别

    set global validate_password.policy=0;
    set global validate_password.length=1;

    6. 把/etc/my.cnf 文件末尾的 skip-grant-tables 去掉,重启MySQL服务,修改完成。

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  • 原文地址:https://www.cnblogs.com/mschen/p/11511578.html
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