topic Re: Diff in Operating System - HP-UX

Diff

Vanquish — Tue, 27 Apr 2004 14:54:50 GMT

Hi
I want to do a diff between two files and want output that lines not present in second file.

Ex diff file1 file2
output only lines present in file1 and not file2.
Thanks

Re: Diff

Charlie Rubeor — Tue, 27 Apr 2004 15:04:23 GMT

Try the following

comm -1 file1 file2

Re: Diff

Sanjay_6 — Tue, 27 Apr 2004 15:11:45 GMT

Hi,

Try

sdiff -s file1 file2

Do "man sdiff" for more details / help.

Hope this helps.

Regds

Re: Diff

Scott Palmer_1 — Tue, 27 Apr 2004 15:15:41 GMT

on hpux it is comm -23 file1 file2
Regards

Scott

Re: Diff

Shane Travis — Tue, 27 Apr 2004 15:15:46 GMT

Charlie almost has it right. Comm shows three columns:

Col1 = lines that appear ONLY in file1
Col2 = lines that appear ONLY in file2
col3 = lines that appear in both files

To show only column one, you have to suppress the other two columns, so what you want is:

comm -23 file1 file3

Re: Diff

Victor Fridyev — Tue, 27 Apr 2004 15:16:24 GMT

Re: Diff

Juergen Tappe — Tue, 27 Apr 2004 17:35:33 GMT

That should do it as well :

diff file1 file2 | grep "^< " | cut -c3-

Re: Diff

Mike Stroyan — Wed, 28 Apr 2004 12:25:43 GMT

Watch out for comm's prerequisite.
The input files need to be sorted.
You could sort into temporary files before using comm.

The suggestion using uniq would be broken by lines that are duplicated within one file.

Re: Diff

H.Merijn Brand (procura — Wed, 28 Apr 2004 13:53:20 GMT

If you would like to get some more answers and some explanations, I bet you will find this thread very interesting

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=388167

It went on after the question was answered, just as in your case

Enjoy, Have FUN! H.Merijn

Re: Diff

Dani Seely — Wed, 28 Apr 2004 22:41:59 GMT

Don't know if you are still having problems or not but thought I'd throw my two cents in. I have needed to do this same thing myself and find the "sdiff" command the easiest to work with. The sdiff command allows you to find differences between two files. The options are VERY useful so I *HIGHLY* suggest you take a few minutes and look at the man page for sdiff. There are some neat options like:
-s allows you to suppress the lines common in both files so all you see are the differences, and
-w allows you to set the width of each line, which is VERY useful if you have long lines.

Suggest you try the following:
# sdiff -s -w132 file1 file2 |grep " < "

The identifier of unique findings in file1 is noted by the < sign with whitespace around it, so use spaces not tabs in front of and after the < sign.

Hope this helps, it works great for me.