====== Update Kernel ======
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Here is how to update the Kernel on Raspbian Jessie. The reason I am doing this is because of something called 'Dirty COW' which is an exploit that could allow someone to take control of your RPi (if it's on the internet).
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    sudo apt-get update
    sudo apt-get install raspberrypi-kernel
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Then reboot the Pi for the changes to take effect.
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