在博客Linux mysql 5.6: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)里面,我介绍了一下安装MySQL后登陆MySQL时会遇到ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) 这个错误,当时不知道真正的原因,搜索了一些网上的资料,测试验证了如何解决这个问题,但是一直不知道具体的原因。今天终于把这个问题给彻底搞清楚了。

下面我以MySQL 5.6.20为例子,刨析一下这个错误的真正原因,如下所示

[root@DB-Server tmp]# rpm -ivh MySQL-server-advanced-5.6.20-1.rhel5.x86_64.rpm

Preparing...                ########################################### [100%]

   1:MySQL-server-advanced  ########################################### [100%]

warning: user mysql does not exist - using root

warning: group mysql does not exist - using root

2015-03-26 10:49:06 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2015-03-26 10:49:07 5082 [Note] InnoDB: Using atomics to ref count buffer pool pages

2015-03-26 10:49:07 5082 [Note] InnoDB: The InnoDB memory heap is disabled

2015-03-26 10:49:07 5082 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins

2015-03-26 10:49:07 5082 [Note] InnoDB: Memory barrier is not used

2015-03-26 10:49:07 5082 [Note] InnoDB: Compressed tables use zlib 1.2.3

2015-03-26 10:49:07 5082 [Note] InnoDB: Using Linux native AIO

2015-03-26 10:49:07 5082 [Note] InnoDB: Using CPU crc32 instructions

2015-03-26 10:49:07 5082 [Note] InnoDB: Initializing buffer pool, size = 128.0M

2015-03-26 10:49:07 5082 [Note] InnoDB: Completed initialization of buffer pool

2015-03-26 10:49:07 5082 [Note] InnoDB: The first specified data file ./ibdata1 did not exist: a new database to be created!

2015-03-26 10:49:07 5082 [Note] InnoDB: Setting file ./ibdata1 size to 12 MB

2015-03-26 10:49:07 5082 [Note] InnoDB: Database physically writes the file full: wait...

2015-03-26 10:49:07 5082 [Note] InnoDB: Setting log file ./ib_logfile101 size to 48 MB

2015-03-26 10:49:07 5082 [Note] InnoDB: Setting log file ./ib_logfile1 size to 48 MB

2015-03-26 10:49:08 5082 [Note] InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0

2015-03-26 10:49:08 5082 [Warning] InnoDB: New log files created, LSN=45781

2015-03-26 10:49:08 5082 [Note] InnoDB: Doublewrite buffer not found: creating new

2015-03-26 10:49:08 5082 [Note] InnoDB: Doublewrite buffer created

2015-03-26 10:49:08 5082 [Note] InnoDB: 128 rollback segment(s) are active.

2015-03-26 10:49:08 5082 [Warning] InnoDB: Creating foreign key constraint system tables.

2015-03-26 10:49:08 5082 [Note] InnoDB: Foreign key constraint system tables created

2015-03-26 10:49:08 5082 [Note] InnoDB: Creating tablespace and datafile system tables.

2015-03-26 10:49:08 5082 [Note] InnoDB: Tablespace and datafile system tables created.

2015-03-26 10:49:08 5082 [Note] InnoDB: Waiting for purge to start

2015-03-26 10:49:08 5082 [Note] InnoDB: 5.6.20 started; log sequence number 0

2015-03-26 10:49:08 5082 [Note] RSA private key file not found: /var/lib/mysql//private_key.pem. Some authentication plugins will not work.

2015-03-26 10:49:08 5082 [Note] RSA public key file not found: /var/lib/mysql//public_key.pem. Some authentication plugins will not work.

A random root password has been set. You will find it in '/root/.mysql_secret'.

2015-03-26 10:49:09 5082 [Note] Binlog end

2015-03-26 10:49:09 5082 [Note] InnoDB: FTS optimize thread exiting.

2015-03-26 10:49:09 5082 [Note] InnoDB: Starting shutdown...

2015-03-26 10:49:10 5082 [Note] InnoDB: Shutdown completed; log sequence number 1625977

 

 

2015-03-26 10:49:10 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2015-03-26 10:49:10 5104 [Note] InnoDB: Using atomics to ref count buffer pool pages

2015-03-26 10:49:10 5104 [Note] InnoDB: The InnoDB memory heap is disabled

2015-03-26 10:49:10 5104 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins

2015-03-26 10:49:10 5104 [Note] InnoDB: Memory barrier is not used

2015-03-26 10:49:10 5104 [Note] InnoDB: Compressed tables use zlib 1.2.3

2015-03-26 10:49:10 5104 [Note] InnoDB: Using Linux native AIO

2015-03-26 10:49:10 5104 [Note] InnoDB: Using CPU crc32 instructions

2015-03-26 10:49:10 5104 [Note] InnoDB: Initializing buffer pool, size = 128.0M

2015-03-26 10:49:10 5104 [Note] InnoDB: Completed initialization of buffer pool

2015-03-26 10:49:10 5104 [Note] InnoDB: Highest supported file format is Barracuda.

2015-03-26 10:49:10 5104 [Note] InnoDB: 128 rollback segment(s) are active.

2015-03-26 10:49:10 5104 [Note] InnoDB: Waiting for purge to start

2015-03-26 10:49:10 5104 [Note] InnoDB: 5.6.20 started; log sequence number 1625977

2015-03-26 10:49:10 5104 [Note] RSA private key file not found: /var/lib/mysql//private_key.pem. Some authentication plugins will not work.

2015-03-26 10:49:10 5104 [Note] RSA public key file not found: /var/lib/mysql//public_key.pem. Some authentication plugins will not work.

2015-03-26 10:49:10 5104 [Note] Binlog end

2015-03-26 10:49:10 5104 [Note] InnoDB: FTS optimize thread exiting.

2015-03-26 10:49:10 5104 [Note] InnoDB: Starting shutdown...

2015-03-26 10:49:12 5104 [Note] InnoDB: Shutdown completed; log sequence number 1625987

 

 

 

 

A RANDOM PASSWORD HAS BEEN SET FOR THE MySQL root USER !

You will find that password in '/root/.mysql_secret'.

 

You must change that password on your first connect,

no other statement but 'SET PASSWORD' will be accepted.

See the manual for the semantics of the 'password expired' flag.

 

Also, the account for the anonymous user has been removed.

 

In addition, you can run:

 

  /usr/bin/mysql_secure_installation

 

which will also give you the option of removing the test database.

This is strongly recommended for production servers.

 

See the manual for more instructions.

 

Please report any problems at http://bugs.mysql.com/

 

The latest information about MySQL is available on the web at

 

  http://www.mysql.com

 

Support MySQL by buying support/licenses at http://shop.mysql.com

 

WARNING: Found existing config file /usr/my.cnf on the system.

Because this file might be in use, it was not replaced,

but was used in bootstrap (unless you used --defaults-file)

and when you later start the server.

The new default config file was created as /usr/my-new.cnf,

please compare it with your file and take the changes you need.

MySQL的安装日志信息中,你会看到MySQL生成了root用户的随机密码(如下截图所示),并将这个随机密码放置在/root/.mysql_secret中。并且强制在第一次登陆时修改root用户的密码。Mysql 5.6及以后版本出处于安全考虑,root密码不为空。所以在MySQL的安装过程中,会生成一个随机密码,但是对于我们这样的初学者,不了解情况,于是便从网上搜索如何解决问题的资料,而问题关键在此,很多做技术的人,了解不够深入,又喜欢随波逐流,停留在问题的表层,并未深入研究。而高手又不屑于这类简单的问题。

A RANDOM PASSWORD HAS BEEN SET FOR THE MySQL root USER !

You will find that password in '/root/.mysql_secret'.

You must change that password on your first connect,

no other statement but 'SET PASSWORD' will be accepted.

See the manual for the semantics of the 'password expired' flag.

Also, the account for the anonymous user has been removed.

知道了错误的前因后果,那么很容易就搞定这个问题了。找到随机密码,登录数据库后修改密码。问题解决

[root@DB-Server tmp]# mysql -u root -p

Enter password: 

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 8

Server version: 5.6.20-enterprise-commercial-advanced

 

Copyright (c) 2000, 2014, 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> show databases;

ERROR 1820 (HY000): You must SET PASSWORD before executing this statement

mysql> set password=password('wer@34');

Query OK, 0 rows affected (0.03 sec)

 

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| test               |

+--------------------+

4 rows in set (0.00 sec)

MySQL ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)的真正原因的更多相关文章

  1. Mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost'(using password: YSE)

    安装mysql后,使用命令登录mysql居然报错了,Mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost'(using ...

  2. MySQL ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO

    MySQL安装完server端和客户端后,登录Mysql时报错:[root@rhel204 MySQL 5.6.23-RMP]# mysqlERROR 2002 (HY000): Can't conn ...

  3. [mysql] ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES).

    用mysql -u root -p显示ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YE ...

  4. MySQL ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) 的解决办法和原因

    这两天下载了MySQL5.7.11进行安装,发现到了初次使用输入密码的时候,不管怎样都进不去,即使按照网上说的在mysqld 下面添加skip-grant-tables也是不行,后来研究了两天,终于找 ...

  5. Linux mysql 5.6: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

    案例环境: 操作系统 :Red Hat Enterprise Linux Server release 5.7 (Tikanga) 64 bit 数据库版本 : Mysql 5.6.19 64 bit ...

  6. mysql 链接失败(ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES))

    mysql链接失败(ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)) 修改: # ...

  7. 安装mysql因为/tmp权限不足而导致ERROR 1045 (28000): Access denied for user root@localhost (using password: NO)的解决方案

    本机是centos 6.5  安装的mysql是5.1的版本. 在安装mysql之后,第一次启动mysql服务的时候,需要/tmp有777(rwxrwxrwx)的权限,然而楼主的/tmp是755(rw ...

  8. MySQL学习笔记——ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

    ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) Enter password: E ...

  9. 重置密码解决MySQL for Linux错误 ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

    出现报错: Warning: World-writable config file '/etc/my.cnf' is ignored // 该文件权限过高ERROR 1045 (28000): Acc ...

随机推荐

  1. C算法编程题(六)串的处理

    前言 上一篇<C算法编程题(五)“E”的变换> 连续写了几篇有关图形输出的编程题,今天说下有关字符串的处理. 程序描述 在实际的开发工作中,对字符串的处理是最常见的编程任务.本题目即是要求 ...

  2. geotrellis使用(二)geotrellis-chatta-demo以及geotrellis框架数据读取方式初探

    在上篇博客(geotrellis使用初探)中简单介绍了geotrellis-chatta-demo的大致工作流程,但是有一个重要的问题就是此demo如何调取数据进行瓦片切割分析处理等并未说明,经过几天 ...

  3. [c++] Copy Control

    C++ allows the programmer to define how objects are to be copied, moved, assigned and destroyed. Tog ...

  4. PHP类的原理

    一.类的实现 类的内部存储结构: struct _zend_class_entry { char type; // 类型:ZEND_INTERNAL_CLASS / ZEND_USER_CLASS c ...

  5. chrome扩展程序开发

    首先,明确两个概念的区别:chrome扩展程序和Web Apps.具体参考:http://www.chromi.org/archives/10106 本文只讨论chrome扩展程序. 最好的开发教程莫 ...

  6. Cesium应用篇:3控件(4)Geocoder

    Geocoder是一个非常简单的控件,但也是非常常用且实用的控件,顾名思义,Geocoder就是地理编码的意思,而平常我们经常会查询一些地物,也就是常用的POI搜索,就是Geocoder的功劳. 首先 ...

  7. Equals和ReferenceEquals

    稍微分析下一下两个方法的区别: public static bool Equals(object objA, object objB); public static bool ReferenceEqu ...

  8. 分享在winform下实现模块化插件编程

    其实很早之前我就已经了解了在winform下实现插件编程,原理很简单,主要实现思路就是:先定一个插件接口作为插件样式及功能的约定,然后具体的插件就去实现这个插件接口,最后宿主(应用程序本身)就利用反射 ...

  9. ASP.NET MVC中获取URL地址参数的两种写法

    一.url地址传参的第一种写法 1.通过mvc中默认的url地址书写格式:控制器/方法名/参数 2.实例:http://localhost:39270/RequestDemo/Index/88,默认参 ...

  10. 安装DotNetCore.1.0.1-VS2015Tools.Preview2.0.2出现0x80072f8a未指定的错误

    本文转载自: http://www.cnblogs.com/JiaoWoWeiZai/p/5892255.html 最近DotNetCore更新到了1.0.1,Azure tools也更新到了2.9. ...