找到两个文件之间的区别 [英] Find the difference between two files

问题描述

我有以下情况:

file1.dat类似于:

The file1.dat is like:

1 2
1 3
1 4
2 1

和file2.dat就像:

and the file2.dat is like:

1 2
2 1
2 3
3 4

我想找到第二个文件与第一个文件之间的差异.我尝试了 grep -v -f file1 file2 ，但是我的实际文件大于这两个文件，当我尝试使用它时，外壳永无止境地工作了.

I want to find the differences between the second file from the first. I tried wit grep -v -f file1 file2 but my real files are bigger than this two and when I tried with it the shell never ended is work.

结果应为:

2 3
3 4

文件已排序，并且它们具有相同数量的元素.用awk找到解决方案的任何方法吗?

The files are sorted and they have the same number of elements. Any way to find a solution with awk?

推荐答案

似乎您希望 file2 中的行不在 file1 中:

Seems like you want lines in file2 that are not in file1:

$ awk 'FNR==NR{a[$0];next}!($0 in a)' file1 file2
2 3
3 4

但是使用 comm 更简单:

$ comm -13 file1 file2
2 3
3 4

这篇关于找到两个文件之间的区别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！