问题描述：
[多选]
What are three actions performed by the mysql_secure_installation tool？（）mysql_secure_安装工具执行的三个操作是什么？
A．It prompts you to set the root user account password.它会提示您设置根用户帐户密码。
B．It checks whether file permissions are appropriate within datadir.
C．It asks to remove the test database, which is generated at installation time.它要求删除在安装时生成的测试数据库。
D．It can delete any anonymous accounts.它可以删除任何匿名帐户。
E．It verifies that all users are configuration with the longer password hash.
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上一篇：Which statement is true about FLUSH LOGS command？（）关于FLUSH LOGS命令，哪个语句是正确的？
下一篇：You install a copy of Mysql 5．6．13 on a brand new Linux server by using RPM packages． The server starts successfully as verified by the following commands( )（）您可以使用RPM包在全新的Linux服务器上安装Mysql 5．6．13的副本。通过以下命令验证，服务器成功启动( )You attempt to log in as the root user with the following command( )您尝试使用以下命令以root用户身份登录( )Which statement is true about this scenario？关于这种情况，哪种说法是正确的？
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