如何从给定的文本文件中删除所有空格 [英] How to remove all white spaces from a given text file

问题描述

我想从给定的文本文件中删除所有空格.是否有任何可用的 shell 命令?或者，如何为此使用 sed.

I want to remove all the white spaces from a given text file. Is there any shell command available for this ? Or, how to use sed for this purpose.

我想要如下内容:

$ cat hello.txt |sed ....

$ cat hello.txt | sed ....

我试过了:cat hello.txt |sed 's///g' .但它只删除空格，而不是制表符.

I tried this : cat hello.txt | sed 's/ //g' .But it removes only spaces, not tabs.

推荐答案

$ man tr
NAME
    tr - translate or delete characters

SYNOPSIS
    tr [OPTION]... SET1 [SET2]

DESCRIPTION
   Translate, squeeze, and/or delete characters from standard 
   input, writing to standard output.

为了擦除所有空格，包括换行符，您可以尝试:

In order to wipe all whitespace including newlines you can try:

cat file.txt | tr -d " 	

" 

您还可以使用 tr 定义的字符类(归功于 htompkins 评论):

You can also use the character classes defined by tr (credits to htompkins comment):

cat file.txt | tr -d "[:space:]"

例如，为了只擦除水平空白:

For example, in order to wipe just horizontal white space:

cat file.txt | tr -d "[:blank:]"

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