在这个例子中，我们调用了pwd(打印工作目录)命令，使用BusyBox进入了a sh shell，并在a sh中调用了pwd。

In this example, you invoke the PWD (print working directory) command, enter the ash shell within BusyBox, and invoke PWD within ash.

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在这一节，我会首先向你介绍三个命令：pwd(打印当前工作目录)，cd(改变目录)，还有ls(显示出文件和目录)。

In this lesson, I will introduce your first three commands: PWD (print working directory), CD (change directory), and ls (list files and directories).

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表示打印当前工作目录的名称的FTP PWD协议方法。

Represents the FTP PWD protocol method that prints the name of the current working directory.

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