AWK tricks and tips
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remove duplicate lines without sorting (will keep first instance)
awk '!a[$0]++' file
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filtering - if the 5th column is 0 then skip it and print the rest
awk '{ if ($5 == 0) next; print }' file
remove duplicate lines without sorting (will keep first instance)
awk '!a[$0]++' file
filtering - if the 5th column is 0 then skip it and print the rest
awk '{ if ($5 == 0) next; print }' file