Mysql 忘记root密码的解决方案

最新推荐文章于 2025-09-12 10:21:09 发布

原创最新推荐文章于 2025-09-12 10:21:09 发布 · 224 阅读

0 ·

CC 4.0 BY-SA版权

MySQL 专栏收录该内容

3 篇文章

订阅专栏

该博客介绍了在MySQL中通过安全模式修改root用户密码的步骤。首先，在my.cnf配置文件中添加skip-grant-tables，然后重启MySQL服务。接着，不需权限直接登录MySQL并更新root用户的密码。完成修改后，注释掉skip-grant-tables，再次重启服务，确保系统安全。

1 修改my.cnf

在my.cnf中添加skip-grant-tables;

[root@VM_0_9_centos ~]# vim /etc/my.cnf

[mysqld]
bind-address=0.0.0.0
port=3306
user=mysql
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
#添加此句话
skip-grant-tables  

pid-file=/tmp/mysqld/mysqld.pid
log-error=/var/log/mysqld.log
#character config
character_set_server=utf8mb4
symbolic-links=0
explicit_defaults_for_timestamp=true

2 重启MySQL服务

[root@VM_0_9_centos ~]# service mysql restart
Shutting down MySQL..                                      [  OK  ]
Starting MySQL..

3 登录

[root@VM_0_9_centos ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.28 MySQL Community Server (GPL)

Copyright (c) 2000, 2019, 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 修改root用户密码

mysql> update mysql.user set authentication_string=password('newpassword') where User='root';
Query OK, 2 rows affected (0.00 sec)
Rows matched: 2  Changed: 2  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.03 sec)

5 再次修改`my.cnf`

在my.cnf中注释掉skip-grant-tables;

[mysqld]
bind-address=0.0.0.0
port=3306
user=mysql
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
#注释掉此句话
#skip-grant-tables  

pid-file=/tmp/mysqld/mysqld.pid
log-error=/var/log/mysqld.log
#character config
character_set_server=utf8mb4
symbolic-links=0
explicit_defaults_for_timestamp=true

6 再次重启MySQL服务

[root@VM_0_9_centos ~]# service mysql restart
Shutting down MySQL..                                      [  OK  ]
Starting MySQL..