I just upgraded my kernel to version 2.6.38 & I seem to have missed a few modules. I tried using diff to get a list of the differences between the files lsmod-2.6.35 & lsmod-2.5.38, which I created for this.

Unfortunatly I can't seem to figure out the right syntax to do what I want which is to just show me whats missing. For example, I want to subtract the lines from file1 & file2 which are the same, leaving me with the difference in file3. i.e. file3 = file1 - file2

Is this possible or am I just using the wrong program. Any help is much apppreciated. TIA

Well Im not a diff expert but this is what I would do:

given file A:
and file B:
diff A B

should give:

2c2,3
< DEF
---
> STU
> VWX

which you can then grep for all the new lines in B:

diff A B | grep ^\>

ex output:

> STU
> VWX


Should work no?

You could even just use grep directly.
-f takes the search patterns from a file instead of the command line.
-v inverts the search, to show what doesn't match.
-F searches for fixed strings only. Not necessary, but more efficient on big operations.

So the first example searches fileb.txt for all the lines in filea.txt, and outputs anything it doesn't find. And vice-versa for example 2.

Thanks for the help. Grep seems to give me what I was looking for. Hopefully I get everything in the kernel this time. A year without the internet & starting back into linux with a different distro & I'm feeling like a newbie all over again Ahh, buts good to have the internet back. Thanks again.