mysql的root权限故障解决方法

mysql> select * from mysql.user\G
*************************** 1. row ***************************
Host:
User: root
Password: *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: N
Repl_client_priv: N
Create_view_priv: N
Show_view_priv: N
Create_routine_priv: N
Alter_routine_priv: N
Create_user_priv: N
Event_priv: N
Trigger_priv: N
Create_tablespace_priv: N
ssl_type:
ssl_cipher:
x509_issuer:
x509_subject:
max_questions: 0
max_updates: 0
max_connections: 0
max_user_connections: 0
plugin:
authentication_string: NULL
1 row in set (0.01 sec)

mysql> delete from mysql.user where user='root';
Query OK, 1 row affected (0.00 sec)

mysql> use mysql
Database changed
mysql> insert into user (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,Create_tablespace_priv,User,Password) values ( 'Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','root','root');
Query OK, 1 row affected, 3 warnings (0.01 sec)

mysql>
mysql> UPDATE user SET Password=PASSWORD('root') 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> select * from mysql.user\G
*************************** 1. row ***************************
Host:
User: root
Password: *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B
Select_priv: Y
Insert_priv: Y
Update_priv: Y
Delete_priv: Y
Create_priv: Y
Drop_priv: Y
Reload_priv: Y
Shutdown_priv: Y
Process_priv: Y
File_priv: Y
Grant_priv: Y
References_priv: Y
Index_priv: Y
Alter_priv: Y
Show_db_priv: Y
Super_priv: Y
Create_tmp_table_priv: Y
Lock_tables_priv: Y
Execute_priv: Y
Repl_slave_priv: Y
Repl_client_priv: Y
Create_view_priv: Y
Show_view_priv: Y
Create_routine_priv: Y
Alter_routine_priv: Y
Create_user_priv: Y
Event_priv: Y
Trigger_priv: Y
Create_tablespace_priv: Y
ssl_type:
ssl_cipher:
x509_issuer:
x509_subject:
max_questions: 0
max_updates: 0
max_connections: 0
max_user_connections: 0
plugin:
authentication_string: NULL
1 row in set (0.00 sec)