新的管理模式增强并取代了单用户模式，它可以临时限制对数据库服务器的访问，以执行管理任务。

The new administration mode enhances and replaces single-user mode as a way to temporarily restrict access to the database server to perform administrative tasks.

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如果您可以访问该系统，但由于某种原因而无法终止损害系统的进程，可以切换到单用户模式，这将停止所有非关键的服务以及任何用户运行的进程。

If you can access the system but can't kill the offending process for whatever reason, shutting down to single-user mode stops all non-essential services and any user-run processes.

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如果需要以单用户模式访问机器(不需要指定口令就能够让您获得root访问权限！)，那么在grub主屏幕上选择Linux OS。

If you need to access the machine in single-user mode (giving you root access without specifying a password!), select the Linux OS at the GRUB main screen.

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