I have a textfile and i want to search for a duplicate line in that file and delete that duplicate line plus the next 5 lines after that.

Can any one help?

Thanks

hi,
with uniq I don't think(if I am not wrong) it can be done what you want. I tryed it with awk and it worked. Try this:

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awk 'BEGIN{i=10}{if(prev==$0)i=1; if(i>7&&prev!="") print prev; prev=$0;i=i+1}' my_file.txt
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I hopes it works for you as well.
bye,
ducasio