stops chrome os updates

 bash <(curl -s -S -L https://raw.githubusercontent.com/jay0lee/cros-scripts/master/disable_cros_updates.sh)

sudo mkdir -p /mnt/stateful_partition/etc
sudo bash -c 'echo "CHROMEOS_RELEASE_VERSION=99999.9.9" > /mnt/stateful_partition/etc/lsb-release'

echo "Disabled Chrome OS updates. Delete /mnt/stateful_partition/etc/lsb-release file to re-enable."