timeout= is the number of tenths of a second that the boot prompt will wait before automatically loading the default OS, in this case Linux.

timeout= 是引导提示在自动引导默认 OS（本例中是 Linux）之前的等待时间（以十分之一秒为单位）。

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Specifically loading the Linux option will then prompt you to enter a password, which in this case is Linux.

指定加载linux选项，会提示输入一个口令，在本例中是linux。

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