New IP

reset-ip.sh

#!/usr/bin/env bash
# WARNING: sed abuse ahead
set -e
# First, find out what interface you're using
INTERFACE=$(ifconfig | grep -e "RUNNING" | grep -v "LOOPBACK" | sed -e "s/:.*//")
# Then, get your current mac address
OLDMAC=$(ifconfig | awk "/$INTERFACE/{f=1} f{print; if (/ether/) exit}" | grep -e "ether" | sed -e 's/^.*ether \(.\{17\}\)\(.*\)/\1/') 
# Get a new mac address
END=$(echo $OLDMAC | sed -e "s/.*:\(..$\)/\1/")
if [ "$END" == "ff" ]
then
  NEWEND="00"
else
  # Increment by one
  NEWEND=$(printf "0x%02X" $((0x$END + 0x1)) | sed -e "s/0x\(..\)/\1/")
fi
NEWMAC="$(echo $OLDMAC | sed -e "s/\(.\{15\}\)\(..\)/\1/")$NEWEND"
echo "Change '$OLDMAC' to '$NEWMAC' on interface '$INTERFACE' [y/n]? "
read answer
# Change MAC address of INTERFACE
if [ "$answer" == "y" ]
then
  echo "Resetting..."
  sudo ifconfig $INTERFACE down && sudo ifconfig $INTERFACE hw ether $NEWMAC && sudo ifconfig $INTERFACE up
  sudo systemctl restart NetworkManager
  echo "Done"
  exit 0
else
  echo "Quitting"
  exit 1
fi
# Now just reconnect to the wifi!