Diff

[Vanquish]

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

[Charlie Rubeor]

Try the following

comm -1 file1 file2

[Sanjay_6]

Hi,

Try

sdiff -s file1 file2

Do "man sdiff" for more details / help.

Hope this helps.

Regds

[Scott Palmer_1 · Accepted solution]

on hpux it is comm -23 file1 file2
Regards

Scott

[Shane Travis]

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

[Victor Fridyev]

Try this:

cat f1 f2 |sort -u >tmpf
cat f2 tmpf |sort |uniq -u
cat f1 tmpf |sort |uniq -u

[Juergen Tappe]

That should do it as well :

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

[Mike Stroyan]

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.

[H.Merijn Brand (procura]

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

[Dani Seely]

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.