如何删除BASH中仅包含数字的行? [英] How to delete lines containing only numbers in BASH?

问题描述

我有一个TXT文件.如何删除仅包含数字的行.例如:

I have a TXT file. How can I delete only those lines which only contain numbers. For e.g.:

This has some text.
1300
This has some more text.
1210
This has a text and some numbers. 12

在上面的示例中，只有第2行和第4行会被删除，因为它们是除数字之外没有其他符号的行.

In the sample above, only lines 2 and 4 would be deleted as they are the ones that contain no other symbols besides numbers.

推荐答案

使用grep:

grep -v -E '^[0-9]+$' < source.txt > destination.txt

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