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I ve been trying to use uniq -u to print the unique lines of a file with a single column

uniq -u samples3

but I get nothing! No output! The original file is pretty big (ca. 40mil lines) but still it makes no sense that i get no output...

I have already sorted it, so, what do I do wrong?

example file (only part of the original one): https://filebin.net/okmotq7t6p2g67o3

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1 Answers1

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this does the trick perfectly

awk '!a[$1]++' < samples3
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