mysql 1045 1044等综合问题的解决方法讲解

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。

首先

$ 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

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

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。

$ 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

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