How does one boot a Linux OS using an external USB hard drive on a UEFI Notebook computer such as the ASUS X555LA?

Kabeer Sayeed

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May 5, 2017
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I would like to install and run a Linux OS such as Kubuntu 14.04 or 16.04 using an external hard drive connected to the USB 3.0 port of an ASUS X555LA notebook computer. This computer has a UEFI BIOS.

I am able to install the Linux OS but when I try to start up the system using the external hard drive the system does not start up from the external drive.

However, the system does start up with the very same OS installed on the internal drive of the notebook computer.

Is there a particular set of UEFI settings that need to be used in order to enable starting up from an external hard drive?