如何修改mysql root密码忘了怎么办

发布网友 发布时间：2022-02-26 19:16

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懂视网 时间：2022-02-26 23:38

产品型号：Thinkpad E15

系统版本：centos8

软件版本：mysql 5.7

mysql忘记root密码怎么办

启动MySQL服务的时候跳过权限表认证。

停止数据库 

[root@xuegod63 ~]# systemctl stop mariadb

直接通过安全模式启动并跳过用户名认证

[root@xuegod63 ~]# mysqld_safe --skip-grant-table   &

修改密码

[root@xuegod63 ~]# mysql

MariaDB [(none)]> update mysql.user set password=password('xuegod') where user='root' and host='localhost';

通过新密码关闭数据库

[root@xuegod63 ~]# mysql

admin -uroot -pxuegod shutdown

重新启动数据库

[root@xuegod63 ~]# systemctl start mariadb

注：如果修改配置文件绕过权限表认证，则启动数据库前应删除配置文件中添加的skip-grant-tables。

新密码登录数据库

[root@xuegod63 ~]# mysql

-uroot -pxuegod

总结：

1、停止数据库

2、通过安全模式跳过安全表启动并修改密码

3、使用新密码关闭数据库后重新启动mysql

热心网友 时间：2022-02-26 20:46

mysql5.6忘记数据库的root密码：
[root@oraserver139 ~]# mysql -uroot -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
查看当前安装的mysql版本：

root@oraserver139 ~]# rpm -qa | grep MySQL
MySQL-server-5.6.15-1.el6.x86_64
MySQL-client-5.6.15-1.el6.x86_64
MySQL-shared-compat-5.6.15-1.el6.x86_64
MySQL-devel-5.6.15-1.el6.x86_64
perl-DBD-MySQL-4.022-1.el6.rfx.x86_64
停止mysql服务：

[root@oraserver139 ~]# service mysql stop
Shutting down MySQL.. SUCCESS!
进入到skip-grant-tables模式：
[root@oraserver139 ~]# mysqld_safe --skip-grant-tables
140211 15:37:49 mysqld_safe Logging to '/var/lib/mysql/oraserver139.err'.
140211 15:37:49 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
现在就不需要密码就可以进入mysql了：
[root@oraserver139 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.15 MySQL Community Server (GPL)
Copyright (c) 2000, 2013, 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.
进入mysql系统数据库：
mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
修改root账户密码：
mysql> update user set password=password("12345") where user="root";
Query OK, 4 rows affected (0.02 sec)
Rows matched: 4 Changed: 4 Warnings: 0
刷新权限：
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye
停止mysql进程：
[1]+ Stopped mysqld_safe --skip-grant-tables
启动mysql：
[root@oraserver139 ~]# service mysql start
Starting MySQL SUCCESS!
使用刚才修改的密码进入mysql：
[root@oraserver139 ~]# mysql -uroot -p12345
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.15
Copyright (c) 2000, 2013, 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> show databases;
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement
mysql> SET PASSWORD = PASSWORD('12345');
Query OK, 0 rows affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
修改完成；