Live Ubuntu USB drives are used for the purposes of secure transactions e.g. banking, payments,etc in the absence of live CDs since the devices do not include CD or DVD-ROMs.
Since there are regular patches being published and the USB drives have limited storage, what is the best way to ensure the applications being used e.g. browser, shell, etc are updated without attempting to update the entire base?
Is there another way to perform similar tasks to reduce the attack vectors as opposed to using live Ubuntu USB drives