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pr
===
将文本文件转换成适合打印的格式
## 补充说明
**pr命令** 用来将文本文件转换成适合打印的格式,它可以把较大的文件分割成多个页面进行打印,并为每个页面添加标题。
### 语法
```
pr(选项)(参数)
```
### 选项
```
-h<标题>:为页指定标题;
-l<行数>:指定每页的行数。
```
### 参数
文件:需要转换格式的文件。
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