diff 2 files; output diff's to 3rd file

blt123 · #1 (**permalink**) 05-23-2002

Hello,
I want to compare two files. All records in file 2 that are not in file 1 should be output to file 3.

For example:

file 1
123
1234
123456

file 2
123
2345
23456

file 3 should have
2345
23456

I have looked at diff, bdiff, cmp, comm, diff3 without any luck!

Thanks for your help
Barbara

Younus · #2 (**permalink**) 05-23-2002

comm -23 file2 file1 > file3 should get you what you are looking for.

blt123 · #3 (**permalink**) 05-28-2002

Thanks for the info, it works!

When I read "man" about comm, it had mentioned the output as being "text columns". This confused me, because I wanted the different records.

Thanks again,
Barbara

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