用 sed 替换两个已知字符串之间的未知字符串 [英] replace a unknown string between two known strings with sed

问题描述

我有一个包含以下内容的文件:

I have a file with the following contents:

WORD1 WORD2 WORD3

如何使用sed将WORD1和WORD3之间的字符串替换为foo，使文件内容变为如下所示?:

How can I use sed to replace the string between WORD1 and WORD3 with foo, such that the contents of the file are changed to the following?:

WORD1 foo WORD3

我尝试了以下操作，但显然我遗漏了一些东西，因为这不会产生预期的结果:

I tried the following, but obviously I'm missing something because that does not produce the desired results:

sed -i '' 's/WORD1.*WORD3/foo/g' file.txt

推荐答案

sed -i 's/WORD1.*WORD3/WORD1 foo WORD3/g' file.txt

或

sed -i 's/(WORD1).*(WORD3)/1 foo 2/g' file.txt

您可能需要转义圆括号，这取决于您的 sed 变体.

You might need to escape round brackets, depends on your sed variant.

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