Golfing the Extraction of IP Addresses from ifconfig

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abdula Permalink
September 10, 2011, 07:12

ifconfig | grep -E -o "([0-9]*\.){3}[0-9]"
ifconfig | grep -E -o "[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*"
| grep -E -o "([0-9]{1,3}\.){3}[0-9]{1,3}" | sort -t. -k1,1n -k2,2n -k3,3n -k4,4n | uniq

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