尾逆/打印一切，除了最后N行？ [英] Tail inverse / printing everything except the last n lines?

问题描述

是否有一个（POSIX命令行）的方式来打印所有文件的除了最后n行？用例是，我将有未知大小的文件，所有这些都包含已知大小，这是我想删除的样板页脚。我在想，如果已经有一个实用工具，写它自己之前做到这一点。

Is there a (POSIX command line) way to print all of a file EXCEPT the last n lines? Use case being, I will have multiple files of unknown size, all of which contain a boilerplate footer of a known size, which I want to remove. I was wondering if there is already a utility that does this before writing it myself.

推荐答案

大多数版本头（1） - GNU来源，特别是，但不是BSD衍生 - 有一个特点，做到这一点。它会显示该文件的顶部，除了结束，如果你使用一个负数行打印的数量。

Most versions of head(1) - GNU derived, in particular, but not BSD derived - have a feature to do this. It will show the top of the file except the end if you use a negative number for the number of lines to print.

像这样：

head -n -10 textfile

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