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12 Nov 2007 Sort IP address

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Sorting IP addresses using sort is not easy because the dot confuses sort.
This line makes it possible to sort by the whole value of the address

sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 ipaddresses.txt

You can also sort by the last octet

sort -r. -n +3.0 ipaddresses.txt

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