bash - Remove all occurrences of a duplicate line -

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if want remove lines fields duplicated use sort -u -k n,n. keeps 1 occurrence. if want remove occurrences of duplicate there quick bash or awk way this?

eg have:

1   apple   30 2   banana   21 3   apple   9 4   mango   2

i want:

2 banana   21 4 mango   2

i presort , use hash in perl v. large files going slow.

try sort -k <your fields> | awk '{print $3, $1, $2}' | uniq -f2 -u | awk '{print $2, $3, $1}' remove lines duplicated (without keeping copies). if don't need last field, change first awk command cut -f 1-5 -d ' ', change -f2 in uniq -f1, , remove second awk command.


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