the missing semester

<ESC>键设置 You use the <ESC> key a lot when using Vim: consider remapping Caps Lock to Escape (macOS i

ls练习 Read man ls and write an ls command that lists files in the following manner Includes all files

基本变量 $0 - Name of the script $1 to $9 - Arguments to the script. $1 is the first argument and so on.

https://missing.csail.mit.edu/2020/course-shell/ 第一节课比较简单，只是简单介绍了一下shell,作业也比较简单。 值得记录的只有这个exercise: