Getting free wifi on Linux too

randommac.sh

#!/usr/bin/env bash

# @example
# chmod a+x randommac.sh
# ./randommac.sh wlp2s0

# @credits original macOS / osX version via @rem
# https://remysharp.com/2017/05/29/getting-free-wifi

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