mysql 安裝完成後登陸不了mysql的 shell 即mysql>遇到：ERROR 1045 (28000): Access denied for user 'root'@'localhost‘

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[[email protected] ~]# mysql
ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)

遇到：ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)

網上找了很多的文章還是沒有解決我的問題；

1.首先可以確認的是mysql 命令列 sql命令關鍵字是不區分大小寫；在5.1.51版本；

2.先將正常啟動的mysqld stop掉；

3.再以繞過root口令檢查的方式 start mysqld；

 

以下是解決經過：

1.先將正常啟動的mysqld stop掉

[[email protected] ~]# service mysqld stop
Stopping mysqld:                                           [  OK  ]

2.用繞過root口令檢查的方式 啟動 mysql 伺服器，並且讓其在後頭運行；

[[email protected] ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 25513
[[email protected] ~]# 141215 15:00:16 mysqld_safe Logging to ‘/var/log/mysqld.log‘.
141215 15:00:16 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

3. mysql斷行符號，進入mysql shell，按照前人留下的方法， update user表中的 root 使用者的密碼，結果發現 0 rows affected，再select 細看是 user 表是空的；

[[email protected] ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.51 Source distribution

mysql> UPDATE user SET PASSWORD=PASSWORD(‘123456‘) where USER=‘root‘;       
Query OK, 0 rows affected (0.00 sec)
Rows matched: 0  Changed: 0  Warnings: 0

mysql>  use mysql
Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| ndb_binlog_index          |
| plugin                    |
| proc                      |
| procs_priv                |
| servers                   |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+
23 rows in set (0.00 sec)

mysql> select * from user;
Empty set (0.00 sec)

4.在user表 insert 一個名稱為root的使用者； 

mysql> insert into user(Host,User,Password,Select_priv,Insert_priv) VALUES(‘localhost‘,‘root‘,PASSWORD(‘pass3‘),‘Y‘,‘Y‘);
Query OK, 1 row affected, 3 warnings (0.00 sec)

5.#看到有個root使用者了；

mysql> select * from user                
    -> ;
+-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
| Host      | User | Password                                  | Select_priv | Insert_priv | Update_priv | Delete_priv | Create_priv | Drop_priv | Reload_priv | Shutdown_priv | Process_priv | File_priv | Grant_priv | References_priv | Index_priv | Alter_priv | Show_db_priv | Super_priv | Create_tmp_table_priv | Lock_tables_priv | Execute_priv | Repl_slave_priv | Repl_client_priv | Create_view_priv | Show_view_priv | Create_routine_priv | Alter_routine_priv | Create_user_priv | Event_priv | Trigger_priv | ssl_type | ssl_cipher | x509_issuer | x509_subject | max_questions | max_updates | max_connections | max_user_connections |
+-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
| localhost | root | *35B5E90BC4F5AE5D02ED515DF6B61141F24EDA02 | Y           | Y           | N           | N           | N           | N         | N           | N             | N            | N         | N          | N               | N          | N          | N            | N          | N                     | N                | N            | N               | N                | N                | N              | N                   | N                  | N                | N          | N            |          |            |             |              |             0 |           0 |               0 |                    0 |
+-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
1 row in set (0.00 sec)

6 再更新 root 使用者的密碼，也能返回成功了；

mysql> UPDATE user SET Password = PASSWORD(‘newpass‘) WHERE user = ‘root‘;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> exit

7.stop 剛才的 mysql服務，以正常方式重新啟動mysql 伺服器，mysql -u root -p  密碼是newpass

[[email protected] ~]# service mysqld stop
141215 16:12:24 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
Stopping mysqld:                                           [  OK  ]
[1]+  Done                    mysqld_safe --user=mysql --skip-grant-tables --skip-networking
[[email protected] ~]# service mysqld start
Starting mysqld:                                           [  OK  ]
[[email protected] ~]#
[[email protected] ~]# mysql
ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)
[[email protected] ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.1.51 Source distribution

Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL v2 license

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql>

 

mysql 安裝完成後登陸不了mysql的 shell 即mysql>遇到：ERROR 1045 (28000): Access denied for user 'root'@'localhost‘