Question

I have two csv files F1 and F2 having rows in same order, I want to extract changed/added lines by comparing files F1 and F2 from F2.

I tried diff command but i could see the change. How could i read the pattern and extract the lines from F2?

F1(File 1):

1234,Joe,pieter,[e-mail],male,22
1235,Shally,Jonse,[e-mail],female,24
1235,Harry,poter,[e-mail],male,21
1235,Helen,Jairag,[e-mail],female,21
2585,Dinesh,Jairag,[e-mail],female,21

F2(File 2):

1234,Joe,pieter,[e-mail],male,22
1235,Shally,Jonse,[e-mail],female,24
1235,Harry,Potter,[e-mail],male,21
1235,Helen,Jairag,[e-mail],female,21

Command executed:

diff F2 F1

Out put:

3c3
< 1235,Harry,Potter,[e-mail],male,21
---
> 1235,Harry,poter,[e-mail],male,21
4a5
> 2585,Dinesh,Jairag,[e-mail],female,21

Expected Output in a file F3:

1235,Harry,poter,[e-mail],male,21
2585,Dinesh,Jairag,[e-mail],female,21

Answer 1

diff --changed-group-format='%<' --unchanged-group-format='' file1 file2