Linux command to find similarity in two text files.If both have matching tring, push it to a text file

Question

file1.txt

Message Id:4401811003996404

file2.txt

Message Id:4401811003996404 End Time

Message Id:4401811007868646 End Time

I tried to use cut to trim the End Time from the file2.txt but it cut digits too.

Also tried comm -12 file1.txt and file2.txt, output was blank.

I want output something like this

Message Id:4401811003996404

What was your code to trim the end time? Maybe with a tweak it would work. — pete the pagan-gerbil, Aug 21 '15 at 11:40
I used cut -d : -f5,6.It displayed till Message Id:4401811003996404 End Time.cut -d : -f5 displayed only Message Id — Akshatha Prabhu, Aug 21 '15 at 11:55
possible duplicate of [how to show lines in common (reverse diff)?](http://stackoverflow.com/questions/746458/how-to-show-lines-in-common-reverse-diff) — Surajeet Bharati, Aug 21 '15 at 12:15

Giova · Accepted Answer · 2015-08-21T13:55:18.607

0

Simple:

two files, uno and due.

[root@srvrux33 ~]# cat uno
1 end
2 end
3 end
1 end
[root@srvrux33 ~]# cat due
1
3
[root@srvrux33 ~]#

You can achieve your result in the following way:

[root@srvrux33 ~]# for L in $(cat due); do grep $L uno| uniq | awk '{ print $1 }'; done
1
3
[root@srvrux33 ~]#

Regards Giova

edited Aug 21 '15 at 13:55

answered Aug 21 '15 at 13:40

Giova

Thanks Giova.It worked.Could you please explain me the logic.Thanks in advance. – Akshatha Prabhu Aug 21 '15 at 17:16
It works for the above scenario.But to make sure it is not printing value from one of the file twice i added start and end to above file.This way below file1.txt Start Message Id:4401811003996404 and file2.txt End Message Id:4401811003996404 End Time End Message Id:4401811007868646 End Time.It displayed content of file2.txt repeated.May be if i understand logic i would be able to find a way to make this work.Thanks for the help – Akshatha Prabhu Aug 21 '15 at 18:07

1 Answers1