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Asked: 2023-03-27 05:16:43 +0800 CST

使用 grep 查找包含在空格中或来自开头或结尾的字符串

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如何匹配一些包含在空格中或来自开头或结尾的字符串？

-someword我需要在以下句子中匹配： word1 -someword word2, -someword word1, word1 -someword, -someword。并且不需要在句子中匹配：s-someword,-somewordd

我用正则表达式尝试了上面的 grep grep -r [^ ]-someword[$ ]（即之前-someword必须是一个空格或-someword必须开始句子，之后-someword必须是一个空格或-someword必须结束句子），但它什么也没找到。

grep

1 个回答

  1. Best Answer

    尝试：

    grep -w -e -someword

    来自man grep:

    -w, --word-正则表达式

              Select only those lines containing matches that form whole
          words.  The test is that the matching substring must
          either be at the beginning of the line, or preceded by a
          non-word constituent character.  Similarly, it must be
          either at the end of the line or followed by a non-word
          constituent character.  Word-constituent characters are
          letters, digits, and the underscore.  This option has no
          effect if -x is also
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