sed:每N行后插入一个字符串 [英] sed: insert a string after every N lines

问题描述

我想在我的大文件中每 30 行后插入一个字符串.我正在使用 mini-sed，它不支持 ~(波浪号)范围运算符.我正在寻找仅限 sed 的解决方案.

I want to insert a string after every 30 lines in my large file. I'm using mini-sed, which doesn't support ~ (tilde) range operator. I'm looking for sed-only solution please.

推荐答案

这个线程是另一个如何将事情复杂化的例子.应该这样做:

This thread is another example of how to over complicate things. This should do it:

sed '0~30 s/$/string/g' < inputfile > outputfile

每 30 行字符串"在行尾插入.如果你想要一个带有 "string" 一词的新行，只需使用 "\n string".

Every 30 lines "string" is inserted at the end of the line. If you want a new line with the word "string" just use "\n string".

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