I want to remove all of those lines in which the values of Columns 1 and 2 are identical. In this way, the results would be as follows:
dot is-big 2
cat is-big 3
Is there an awk / grep that code easily help me to solve this problem. My issue is isolating Cols. 1 and 2 and not considering the information in Col. 3 when trying to remove the unique lines.
Can you please explain more...because, from the data you shown above, how do you get the result you provided for identical cols 1 & 2.
Anyways, if you want unique col 1 & 2
I think maybe I did not describe well my problem. I don't want unique Cols1 and 2. I need to remove all unique Col 2. (regardless of what is in Col 1.), In the example I provided, you can see that the Col 2 that remains are duplicates while the Col 2 that were unique are discarded.