Linux下通过命令行创建和设置一个MySQL用户
我想要在MySQL服务器上创建一个新的用户帐号,并且赋予他适当的权限和资源限制。如何通过命令行的方式来创建并且设置一个MySQL用
问题:我想要在MySQL服务器上创建一个新的用户帐号,并且赋予他适当的权限和资源限制。如何通过命令行的方式来创建并且设置一个MySQL用户呢?
要访问一个MySQL服务器,你需要使用一个用户帐号登录其中方可进行。每个MySQL用户帐号都有许多与之相关连的属性,,例如用户名、密码以及权限和资源限制。"权限"定义了特定用户能够在MySQL服务器中做什么,而"资源限制"为用户设置了一系列服务器资源的使用许可。创建或更新一个用户涉及到了对用户帐号所有属性的管理。
下面展示了如何在Linux中创建和设置一个MySQL用户。
首先以root身份登录到MySQL服务器中。
当验证提示出现的时候,输入MySQL的root帐号的密码。
使用如下命令创建一个用户名和密码分别为"myuser"和"mypassword"的用户。
一旦用户被创建后,包括加密的密码、权限和资源限制在内的所有帐号细节都会被存储在一个名为user的表中,这个表则存在于mysql这个特殊的数据库里。
运行下列命令,验证帐号是否创建成功
赋予MySQL用户权限一个新建的MySQL用户没有任何访问权限,这就意味着你不能在MySQL数据库中进行任何操作。你得赋予用户必要的权限。以下是一些可用的权限:
运行以下命令赋予"myuser"用户特定权限。
以上命令中,
例如,为所有数据库/表赋予 CREATE 和 INSERT 权限:
验证给用户赋予的全权限:
将全部的权限赋予所有数据库/表:
你也可以将用户现有的权限删除。使用以下命令废除"myuser"帐号的现有权限:
为用户添加资源限制在MySQL中,你可以为单独的用户设置MySQL的资源使用限制。可用的资源限制如下:
使用以下命令为"myuser"帐号增加一个资源限制:
在
例如,增加 MAXQUERIESPERHOUR 和 MAXCONNECTIONSPERHOUR 资源限制:
验证用户的资源限制:
创建和设置一个MySQL用户最后的一个重要步骤:
如此一来更改便生效了。现在MySQL用户帐号就可以使用了。

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