显示当前目录名或改变当前目录。

CHDIR Displays the name of or changes the current directory.

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现在，我们可以看到，我们已经把当前的工作目录，改变到/usr/X11R6/bin目录下，这个目录下包含很多文件。

Now we can see that we have changed the current working directory to /usr/X11R6/bin and that it is full of files.

youdao

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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