nano Well, anytime you run a program at the command line, like nano, you've almost always been putting one or more words nano hello c GCC hello c after that program's name; nano hello dot C, GCC hello dot C, and any number of MKDIR for make directory, and then peace at one or similar.

好的，任何时候在命令行中运行一个程序，就像，你几乎总是用1个或多个单词,在程序名的后面，许多的建立一个新的子目录，然后恢复平静。

哈佛公开课 - 计算机科学课程节选