linux环境mysql重置密码

Linux环境下，忘记mysql密码怎么办？这里提供两种解决方案。

第一种方案：

在my.cnf配置文件中添加“跳过登陆密码验证”配置项

sed -i "/[mysqld]/ askip-grant-tables" /etc/my.cnf

重启mysqld守护进程，重新加载配置

service mysqld restart

直接无账户无密码登陆mysql

[root@pingkou-developer2 etc]# mysql
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.5.51-log MySQL Community Server (GPL) by Remi

Copyright (c) 2000, 2016, 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.

重新设置root账户密码后，退出登录

mysql> update `mysql`.`user` set `password`=password("admin") where `user`="root";
Query OK, 0 rows affected (0.00 sec)
Rows matched: 3  Changed: 0  Warnings: 0

mysql> exit;
Bye

在my.cnf配置文件中，将skip-grant-tables配置项注释掉，加#注释

sed -i "s/skip-grant-tables/#&/" /etc/my.cnf

重启mysqld守护进程，重新加载配置

[root@pingkou-developer2 pingkou]# service mysqld restart
Stopping mysqld:                                           [  OK  ]
Starting mysqld:                                           [  OK  ]

使用新密码重新登陆mysql,结束

[root@pingkou-developer2 pingkou]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 4
Server version: 5.5.51-log MySQL Community Server (GPL) by Remi

Copyright (c) 2000, 2016, 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.

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