bash function to spoof hw/MAC address of active/current interface

spoofmac.sh

spomac() {
        IFACE=$(ip route get 8.8.8.8 | awk '{print $5}' | head -1)
        MAC=$(printf '%02x' $((0x$(od /dev/urandom -N1 -t x1 -An | cut -c 2-) & 0xFE | 0x02)); od /dev/urandom -N5 -t x1 -An | sed 's/ /:/g')
        ifconfig $IFACE down;
        ifconfig $IFACE hw ether $MAC;
        ifconfig $IFACE up;
}