File commparision

rajini23 · 04-05-2018, 01:23 AM

Hi,

I want to commpare to file and get missing lines out of it,
but it was not working, kindly assist on this issue..

file1:

dewdfg1234
vml123

file2:
DEWDFG1234
vml1245
vml23

out i should get here is:

vml1245

but i am getting:
vml1245
dewdfg1234 --> i should not get this because it is already there in two files one with CASE. but below commands it is not ignoring the case

comm -12 file1 file2
grep -v -f file1 file2

John VV · 04-05-2018, 02:06 AM

normally i use "diff"

Code:

man diff


DIFF(1)                                                 User Commands                                                DIFF(1)



NAME
       diff - compare files line by line

SYNOPSIS
       diff [OPTION]... FILES

DESCRIPTION
       Compare FILES line by line.

       Mandatory arguments to long options are mandatory for short options too.

--- a long output edited out

TB0ne · 04-05-2018, 07:01 AM

Quote:

Originally Posted by rajini23

Hi,
I want to commpare to file and get missing lines out of it, but it was not working, kindly assist on this issue..

file1:
dewdfg1234
vml123

file2:
DEWDFG1234
vml1245
vml23

out i should get here is:
vml1245

but i am getting:
vml1245
dewdfg1234 --> i should not get this because it is already there in two files one with CASE. but below commands it is not ignoring the case

comm -12 file1 file2
grep -v -f file1 file2

After being a member here for seven years now, you should be well aware that you need to do basic research first. As with the numerous other threads you've posted over the years wanting people to write scripts for you, this one also shows little effort.

You can either translate both files to all upper-case and do your comparison, or look at the man page on diff which will ignore case. Again, do basic research on your own first.

MadeInGermany · 04-07-2018, 07:33 AM

Try grep or fgrep with the -i option

Code:

fgrep -ivf file1 file2

For whole line matches (a12 should not match a123) there is -x option for fgrep.

Code:

fgrep -ixvf file1 file2

chrism01 · 04-10-2018, 12:00 AM

You can easily do it with diff, but note even ignoring case, you still have 2 differences, the one you 'want' and 'vml23' vs 'vml123' ...