您看到了引用主目录的不同方法，了解了鲜为人知的cd转移特性，该特性允许替换当前路径中的字符串并切换到新路径。
You saw different ways of referring to home directories, and you learned about the little-known CD shuffle, which allows you to substitute a string in your current path and switch to a new path.
正如您可以从系统的不同目录中执行程序一样，您也可以使用cd命令来切换当前工作目录。
Just as you can execute programs from various directories in the system, so too can you change your current working directory using the CD command.
输入下面的命令，将当前目录切换到发布目录中的bin子目录。
Change the current directory to the bin subdirectory in the release directory by entering the following.
切换到写作目录后，可以用“gitinit”命令将当前目录初始化为一个空白的仓库。
Once you are at the directory you have all of your writing in you can issue the command git init which initializes a blank "repository" for your directory.
函数的作用是：切换到当前目录的父目录（上一步）。
The ftp_cdup() function changes the current directory to the parent directory (one step up).
函数的作用是：切换到当前目录的父目录（上一步）。
The ftp_cdup() function changes the current directory to the parent directory (one step up).
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