ERROR: Timed out waiting for Arduino 101 on /dev/ttyACM0

Thanks @rahulmodi8812, running that script worked for me as well! That said, after updating the board driver to 2.0.2 I no longer see that script included inside the package dir. However, the same script is available on GitHub: curl -sL https://raw.githubusercontent.com/01org/corelibs-arduino101/master/scripts/create_dfu_udev_rule | sudo -E bash -.