如何删除Linux文本中的所有特殊字符 [英] How to remove all special characters in Linux text

问题描述

如何删除图片 1 中显示为蓝色的特殊字符，例如:^ M， ^ A，^ @，^ [.以我的理解，^ M是Windows的换行符，我可以使用sed -i '/^M//g'来删除它，但不能删除其他人.命令dos2unix无效，也无效.有什么办法可以将它们都删除?

How to remove the special characters shown as blue color in the picture 1 like: ^M, ^A, ^@, ^[. In my understanding, ^M is a windows newline character, I can use sed -i '/^M//g' to remove it, but it doesn't work to remove others. The command dos2unix doesn't work, neither. Are there exist any ways that I can use to remove them both?

推荐答案

使用sed删除除可打印字符(字符类[:print:])以外的所有内容:

Remove everything except the printable characters (character class [:print:]), with sed:

sed $'s/[^[:print:]\t]//g' file.txt

[:print:]包括:

• [:alnum:](字母数字)
• [:punct:](标点符号)
• 空间

• [:alnum:] (alpha-numerics)
• [:punct:] (punctuations)
• space

ANSI C引号($'')用于将\t解释为$''中的文字制表符(在bash中).

The ANSI C quoting ($'') is used for interpreting \t as literal tab inside $'' (in bash and alike).

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