就是 “cat” 这个单词。
不认真备课的话，看见 cat 出现在那个地方确实很奇怪。
其实： The cat command in Linux is a versatile tool used for various file-related operations. It stands for "concatenate" and is primarily used to read, concatenate, and write file contents to the standard output. Here are some common uses and examples of the cat command:
Basic Syntax
The basic syntax of the cat command is:
cat [OPTION] [FILE]
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OPTION: Represents various command-line options.
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FILE: The name of the file(s) to be processed.
Viewing File Contents
To display the contents of a single file:
cat filename.txt
