如何在grep中为新行提供模式? [英] How to give a pattern for new line in grep?

问题描述

如何在grep中为新行提供模式?开头换行，结尾换行.不是正则表达式方式.类似 .

How to give a pattern for new line in grep? New line at beginning, new line at end. Not the regular expression way. Something like .

推荐答案

grep 模式与单个行匹配，因此模式无法匹配输入中的换行符.

grep patterns are matched against individual lines so there is no way for a pattern to match a newline found in the input.

但是你可以找到这样的空行:

However you can find empty lines like this:

grep '^$' file
grep '^[[:space:]]*$' file # include white spaces 

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