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mysql 用户管理,主要在两个方面
第一个:用的添加和删除
第二个:就是用户的权限, 权限主要是两方面,一个是 链接权限,另一个是 操作权限
链接权限是 是否可以远程链接
操作权限是 那个数据库可以操作, 那个数据库不能操作, 可以操作什么, 修改,添加,改变表结构等...
最重要的就是 有表 mysql , user
默认有表数据库名字是mysql, 中有个user表, 这个表中记录了用户的信息和权限。
mysql> use mysql Database changed mysql> desc user; +-----------------------+-----------------------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-----------------------+-----------------------------------+------+-----+---------+-------+ | Host | char(60) | NO | PRI | | | | User | char(16) | NO | PRI | | | | Password | char(41) | NO | | | | | Select_priv | enum('N','Y') | NO | | N | | | Insert_priv | enum('N','Y') | NO | | N | | | Update_priv | enum('N','Y') | NO | | N | | | Delete_priv | enum('N','Y') | NO | | N | | | Create_priv | enum('N','Y') | NO | | N | | | Drop_priv | enum('N','Y') | NO | | N | | | Reload_priv | enum('N','Y') | NO | | N | | | Shutdown_priv | enum('N','Y') | NO | | N | | | Process_priv | enum('N','Y') | NO | | N | | | File_priv | enum('N','Y') | NO | | N | | | Grant_priv | enum('N','Y') | NO | | N | | | References_priv | enum('N','Y') | NO | | N | | | Index_priv | enum('N','Y') | NO | | N | | | Alter_priv | enum('N','Y') | NO | | N | | | Show_db_priv | enum('N','Y') | NO | | N | | | Super_priv | enum('N','Y') | NO | | N | | | Create_tmp_table_priv | enum('N','Y') | NO | | N | | | Lock_tables_priv | enum('N','Y') | NO | | N | | | Execute_priv | enum('N','Y') | NO | | N | | | Repl_slave_priv | enum('N','Y') | NO | | N | | | Repl_client_priv | enum('N','Y') | NO | | N | | | Create_view_priv | enum('N','Y') | NO | | N | | | Show_view_priv | enum('N','Y') | NO | | N | | | Create_routine_priv | enum('N','Y') | NO | | N | | | Alter_routine_priv | enum('N','Y') | NO | | N | | | Create_user_priv | enum('N','Y') | NO | | N | | | Event_priv | enum('N','Y') | NO | | N | | | Trigger_priv | enum('N','Y') | NO | | N | | | ssl_type | enum('','ANY','X509','SPECIFIED') | NO | | | | | ssl_cipher | blob | NO | | NULL | | | x509_issuer | blob | NO | | NULL | | | x509_subject | blob | NO | | NULL | | | max_questions | int(11) unsigned | NO | | 0 | | | max_updates | int(11) unsigned | NO | | 0 | | | max_connections | int(11) unsigned | NO | | 0 | | | max_user_connections | int(11) unsigned | NO | | 0 | | +-----------------------+-----------------------------------+------+-----+---------+-------+ 39 rows in set (0.00 sec)
这里看看初始化的时候,这个表中有什么内容
mysql> select host, user from user; +-----------+------+ | host | user | +-----------+------+ | 127.0.0.1 | root | | localhost | root | +-----------+------+ 2 rows in set (0.00 sec)
这里仅仅查看两个数据, host , 和 user
发现用户root可以从两个地方登陆 一个是 127.0.0.1
另一个是 localhost .
表的其部分, 有很多是权限相关的内容。 priv 结尾的。
很有一些其他的选项。
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