BLACK TRIANGLE

while sleep 2
do
    is_device="$(lsusb | grep identiffikator_fleshki)"

    if [ "$is_device" != "" ]; then
        echo "triangle best chanel"

    else
        echo "SHUHER!"
        pkill -f Nazvanie_virtualki
        sleep 1
        veracrypt -d
        shutdown -h now
    fi
done