如果操作系统是DOS，或其他类似的东西，那么这种设置工作就意味着我们可以很快就有自己的命令提示符了。

If the operating system is DOS, or something similar to it, all of this setup work means that you can pretty much have your command prompt instantly.

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初始设置：引导嵌入式系统并提供控制台登录提示符。

Initial setup: We get the embedded system to boot and to offer a console login prompt.

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