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Alex Rivera
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I have a .csv file like this: stack2@domain.example,2009-11-27 01:05:47.893000000,domain.example,127.0.0.1 overflow@domain2.example,2009-11-27 00:58:29.793000000,domain2.example,255.255.255.0 overflow@domain2.example,2009-11-27 00:58:29.646465785,domain2.example,256.255.255.0 ... I have to remove duplicate e-mails (the entire line) from the file (i.e. one of the lines containing overflow@domain2.example in the above example). How do I use uniq on only field 1 (separated by commas)? According to man , uniq doesn't have options for columns. I tried something with sort | uniq but it doesn't work.
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