如何'grep'可以连续流？ [英] How to 'grep' a continuous stream?

问题描述

这是可能使用的grep 在一个连续的数据流？

Is that possible to use grep on a continuous stream?

我的意思是那种一个尾-f＆LT;关于在命令，但的grep ;文件＆gt为了只保留我感兴趣的线路输出。

What I mean is sort of a tail -f <file> command, but with grep on the output in order to keep only the lines that interest me.

我试过尾-f＆LT;文件＆gt; | grep的模式但似乎的grep 曾经尾结束，也就是只能被执行说从来没有。

I've tried tail -f <file> | grep pattern but it seems that grep can only be executed once tail finishes, that is to say never.

推荐答案

打开的grep 的行缓冲模式。

tail -f file | grep --line-buffered my_pattern

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