Hi, I have a huge file which is about 50GB. There are many lines. The file format likes
21 rs885550 0 9887804 C C T C C C C C C C
21 rs210498 0 9928860 0 0 C C 0 0 0 0 0 0
21 rs303304 0 9941889 A A A A A A A A A A
22 rs303304 0 9941890 0 A A A A A A A A A
The question is that there are a few duplicate rows. The definition of the duplicate is meant the second column is repeated. It doesn't mean the entire line are exactly same, just the the second column.
In the above example, line 3 and 4 can be defined as duplicate. The have the same string
rs303304
We can remove either of them.
The delimeter could be a white space or tab.
After remove the duplicate lines the result will be saved in a new file.
Thanks.