MySQL 1045 1044等综合问题解决方法

如果某天发现自己登陆不上MySQL,又恰巧记不得密码,那只能通过本地重新修改mysql.user里面的密码。

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$ sudo service mysqld stop //确认mysqld和免安装的mysqld都关闭
$ sudo mysqld_safe --skip-grant-table & //进入本地安全模式
......

到这里后mysql可以直接用root登陆进去不需要密码,接着

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mysql>use mysql
mysql>SELECT host,user,password,Grant_priv,Super_priv FROM mysql.user;
+--------------+---------+-------------------------------------------+------------+------------+
| host | user | password | Grant_priv | Super_priv |
+--------------+---------+-------------------------------------------+------------+------------+
| 192.168.28.% | Looft | *FED29C14B2E900D70B11B1F1B370F953BA51A6A0 | N | Y |
| 192.168.28.% | live | *FED29C14B2E900D70B11B1F1B370F953BA51A6A0 | N | Y |
| 192.168.28.% | root | *FED29C14B2E900D70B11B1F1B370F953BA51A6A0 | Y | Y |
| localhost | ranger | wtfwtfwtf | N | N |
| localhost | root | 0 | Y | Y |
| % | root | *FED29C14B2E900D70B11B1F1B370F953BA51A6A0 | N | Y |
| 127.0.0.1 | root | *FED29C14B2E900D70B11B1F1B370F953BA51A6A0 | Y | Y |
| % | ranger | *84BB87F6BF7F61703B24CE1C9AA9C0E3F2286900 | N | Y |
+--------------+---------+-------------------------------------------+------------+------------+

这里看到ranger@localhost密码有问题,没有权限,没有通过password函数进行加密,跟其他的不一样。于是进行update更改密码并加密

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mysql>UPDATE mysql.user SET Grant_priv='Y', Super_priv='Y',Password=password('wtfwtfwtf') WHERE User='ranger' and host='localhost';
mysql>flush privileges;

搞定之后记得关闭mysqld_safe,并开启mysqld进程。

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$ sudo mysqladmin -uroot -p***** shutdown
$ sudo service mysqld start
$ mysql -uranger -pwtfwtfwtf
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 20
Server version: 5.1.73 Source distribution

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>

测试后ok
新加入规则也很简单

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mysql>insert into mysql.user(Host,User,Password) values("127.0.0.1","ranger",Password=password('wtfwtfwtf'));