Shell Programming and Scripting

If you know which file includes the other:

Code:

grep -vxFf file1 file2

Thanks. thats more useful.

So far I'm using following command to get difference of Newfile

Code:

grep -vxFf oldfile newfile

oldfile:

Code:

weather is pleasant
I am happy

newfile:

Code:

weather is pleasant
I am happy
it is raining outside

output

Code:

it is raining outside

so far its fine. but if i have new file like:
newfile:

Code:

weather WAS pleasant
 I am happy
 it is raining outside

Then output is

Code:

weather WAS pleasant
it is raining outside

Now this is the thing that I dont want... I just want that line that is completely changed (added or removed). if only few words of that line are modified then it shouldn't add that line in output. is there any way to modify this grep command to get my required result? thanks.

You would need clear criteria for what "only a few words" entails..

if criteria means number of words change in a line then i wud say 4 or less. if more than that then output that line.

I don't think that would be workable. Have a look at your original post in number 1 and tell me if changes to 4 words in a line would not constitute a change? It seems to me this thread has petered out into something else. If you have new requirements then I suggest you open a new thread with a clear description, I am closing this one.