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#!/usr/bin/env bash
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# @example
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# chmod a+x randommac.sh
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# ./randommac.sh wlp2s0
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# Came from here: https://gist.github.com/WebReflection/67245d3e05a04299e6cf89df22685081
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if [ "$1" != "" ]; then
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if [ "$(ip link show | grep $1)" != "" ]; then
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if [ ! -f ~/mac-address-$1.bck ]; then
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echo "storing original information in ~/mac-address-$1.bck"
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ip link show > ~/mac-address-$1.bck
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fi
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sudo ip link set dev $1 down
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sudo ip link set dev $1 address $(openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//')
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sudo ip link set dev $1 up
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else
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echo "unknown interface $1"
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echo "available interfaces:"
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ip link show | sed 's/^\([0-9]*:\s*\w*\):.*$/\1/g; s/^\s\s*.*$//g'
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exit 1
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fi
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else
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echo "you need to specify an interface"
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echo "example: $0 wlp2s0"
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exit 1
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fi
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