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