破解Mysql数据库的管理员密码（不时之需）

本文档详细介绍破解 MySQL5.7 数据库的 root 登录密码

忘记 root 登录密码

[root@MySQL1 ~]# mysql -uroot -p1231234
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

在 /etc/my.cnf 配置文件中添加 skip-grant-tables 绕开 MySQL5.7 数据库密码验证

[root@MySQL1 ~]# echo skip-grant-tables >> /etc/my.cnf
[root@MySQL1 ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS! 
Starting MySQL. SUCCESS! 

直接使用 mysql 登录 MySQL5.7 数据库并修改 root 登录密码

[root@MySQL1 ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.19-log Source distribution

Copyright (c) 2000, 2017, 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> ALTER  USER   'root'@'localhost'   IDENTIFIED BY  'password';
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> ALTER  USER   'root'@'localhost'   IDENTIFIED BY  'password';
Query OK, 0 rows affected (0.00 sec)

mysql> quit
Bye

注意：如果在执行该步骤的时候出现 ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement 错误。则执行下 flush privileges; ，再执行该命令即可。

使用新密码 password 登录 MySQL5.7 数据库

[root@MySQL1 ~]# mysql -uroot -ppassword
mysql: [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 4
Server version: 5.7.19-log Source distribution

Copyright (c) 2000, 2017, 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> exit
Bye

使用其他密码不能登录 MySQL5.7 数据库

[root@MySQL1 ~]# mysql -uroot -ppasswordd
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

优化

删掉 /etc/my.cnf 里的 skip-grant-tables

[root@MySQL1 ~]# sed -i -e '/skip-grant-tables/d' /etc/my.cnf

重启数据库

[root@MySQL1 ~]# /etc/init.d/mysqld restart

总结

以上就是破解 MySQL5.7 数据库的 root 登录密码的方法，希望能给大家带来帮助。