Linux命令（类似cat）读取指定数量的字符 [英] Linux command (like cat) to read a specified quantity of characters

问题描述

在linux中是否有像 cat 这样的命令，可以从文件中返回指定数量的字符？

Is there a command like cat in linux which can return a specified quantity of characters from a file?

例如，我有一个文本文件如：

e.g., I have a text file like:

Hello world
this is the second line
this is the third line

我想要的东西会返回前5个字符， 。

And I want something that would return the first 5 characters, which would be "hello".

感谢

推荐答案

也可以：

head -c 100 file  # returns the first 100 bytes in the file

..将提取前100个字节并返回。

..will extract the first 100 bytes and return them.

使用 head 的好处是， tail matches：

What's nice about using head for this is that the syntax for tail matches:

tail -c 100 file  # returns the last 100 bytes in the file

这篇关于Linux命令（类似cat）读取指定数量的字符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！