Files
freeCodeCamp/guide/chinese/bash/bash-cat/index.md
2018-12-28 15:59:39 -08:00

42 lines
814 B
Markdown
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
title: Bash Cat
localeTitle: Bash Cat
---
## Cat
Cat是Unix操作系统中最常用的命令之一。
Cat用于按顺序读取文件并将其打印到标准输出。 这个名字是从它的功能con**cat**enate files而来。
### 用法
```bash
cat [options] [file_names]
```
最常用的选项:
* `-b` ,数字非空白输出行
* `-n` ,对所有输出行进行编号
* `-s` ,挤压多个相邻的空白行
* `-v` ,显示非打印字符,标签和行尾字符除外
### 例子
在终端机打印file.txt的内容
```bash
cat file.txt
```
连接两个文件的内容并在终端机中显示结果:
```bash
cat file1.txt file2.txt
```
#### 更多信息:
* 维基百科https//en.wikipedia.org/wiki/Cat\_Unix