show my ip address

#!/bin/sh

IP=/bin/ip

SED=/bin/sed

CUT=/usr/bin/cut

IF=en0

if [ ! -z ${1} ]

then

  IF=${1}

fi

$IP addr show dev $IF | $SED -n 3p | $SED -e 's/\ \+/\ /g' -e 's/\/.*$//g' | $CUT -d ' ' -f 3

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