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MySQL安装后修改root的随机密码

原创 MySQL 作者:wlovely 时间:2015-07-08 11:00:02 0 删除 编辑
MySQL5.6 安装后,root会生成一个随机密码,无法用root登陆,可用以下方法重置root密码:
1、 /etc/init.d/mysql  start --skip-grant-tables ----启动MySQL服务

2、登入数据库用updatetable的方式修改root密码

[root@ha02 mysql]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.24 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, 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> 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
mysql> update user set password=PASSWORD('root') where user="root";
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> exit

3、重启MySQL服务,用重置后的密码即可登陆

[root@ha02 mysql]# service mysql restart
Shutting down MySQL.. SUCCESS! 
Starting MySQL. SUCCESS! 
[root@ha02 mysql]# mysql -uroot -proot
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 1
Server version: 5.6.24

Copyright (c) 2000, 2015, 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、登陆后还需要设置root密码


mysql> show variables like '%buffer%'
    -> ;
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement
mysql> set password=PASSWORD('root');
Query OK, 0 rows affected (0.07 sec)


mysql> show variables like '%buffer%';
+-------------------------------------+----------------+
| Variable_name                       | Value          |
+-------------------------------------+----------------+
| bulk_insert_buffer_size             | 8388608        |
| innodb_buffer_pool_dump_at_shutdown | OFF            |
| innodb_buffer_pool_dump_now         | OFF            |
| innodb_buffer_pool_filename         | ib_buffer_pool |

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