You will want to add on your MySQL root password if you have it set to the end of that command. You should then see the following.
如果您已经设置了MySQL的root密码，那么在这个命令后面就要添加上root用户的密码。
The default installation of MySQL, particularly the empty root password and the potential vulnerability to buffer overflow, makes the database server an easy target for attacks.
MySQL 的默认安装，特别是根密码空缺和缓冲区溢出的潜在漏洞，使得这个数据库服务器成为容易攻击的目标。
During the install process, MySQL will ask you for a root password.
在安装期间，MySQL会问你root密码。
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