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MySQL中出現連接錯誤:ERROR 1045 (28000): Access denied for user

   MySQL中出現連接錯誤:

  ERROR 1045 (28000): Access denied for user

  ----------------------------------------------------------------------------------

  1.添加用戶

  shell>mysql

  mysql>use mysql

  mysql>grant all privileges on *.* to 'test' identified by 'test' with grant option;

  mysql>flush privileges;

  [也可以使用下面兩種方式建立用戶]

  ------------------------

  $1直接操作mysql.user這張表;

  $2使用DDL語言,

  定義用戶:create user test identified by 'test';

  刪除用戶:drop user test

  ------------------------

  2.使用test登錄(總是無法連接)

  shell>mysql -u test -p

  ERROR 1045 (28000): Access denied for user 'test'@'localhost' (using password: YES)

  3.查看user表,我們會發現user表中的user字段有NULL

  mysql> select host,user from user;

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

  | host | user |

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

  | % | test |

  | localhost | |

  | localhost | root |

  | test.saeg.com.cn | |

  | test.saeg.com.cn | root |

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

  5 rows in set (0.00 sec)

  4.刪除user.user中值為NULL的,或更新NULL為test

  4.1)delete from user where user is NULL

  4.2)update user set user='test' where user is NULL

  問題解決

  另:[我的系統是RHEL4.0]

  1.mysql的配置文件my-*.cnf

  /usr/local/mysql/

  2.初始化數據庫

  /usr/bin/mysql_install_db

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