我得到了一个运行MySQL的服务器，但是"localhost"的"root"用户被错误地删除了。我重新安装MySQL服务器。
我以用户debian-sys-maint登录，并重新创建用户"root"。现在，我有以下用户:
+-----------+------------------+
| host | user |
+-----------+------------------+
| % | root |
| 127.0.0.1 | root |
| srvname | root |
| localhost | debian-sys-maint |
| localhost | root |
+-----------+------------------+
但是如果我运行:
> grant all privileges on *.* to "root"@"localhost" identified by "password";
有:
ERROR 1045 (28000): Access denied for user 'debian-sys-maint'@'localhost' (using password: YES)
Update # 1 :
以root用户登录。
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| multitest |
| mysql |
+--------------------+
3 rows in set (0.00 sec)
mysql> use mysql;
Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| func |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| proc |
| procs_priv |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
更新# 2 :
这是我当前用户的表:
+-----------+------------------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
| 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 | ssl_type | ssl_cipher | x509_issuer | x509_subject | max_questions | max_updates | max_connections | max_user_connections |
+-----------+------------------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
| Euler | root | *D52773855DC0243707A56F7D93CDBC483C3CC2FD | 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 | | | | | 0 | 0 | 0 | 0 |
| 127.0.0.1 | root | *D52773855DC0243707A56F7D93CDBC483C3CC2FD | 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 | | | | | 0 | 0 | 0 | 0 |
| localhost | debian-sys-maint | *9C9844E6DBB297FA7E3AF554FBCC21096F159437 | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | N | N | N | N | N | | | | | 0 | 0 | 0 | 0 |
| localhost | root | *D52773855DC0243707A56F7D93CDBC483C3CC2FD | N | N | N | N | N | N | N | N | N | N | Y | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | | | | | 0 | 0 | 0 | 0 |
| % | root | *D52773855DC0243707A56F7D93CDBC483C3CC2FD | N | N | N | N | N | N | N | N | N | N | Y | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | | | | | 0 | 0 | 0 | 0 |
+-----------+------------------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+
SOLVED.
在检查了我的用户表之后，我运行UPDATE命令给任何"root"用户所有可用的权限。