I just looked at the UNetbootin site and attempted to download and install it. To enter and run the code shown on that page requires both a terminal window to be opened (no problem) AND a password (major problem, as described in a few of my posts). Thank you for the information and the link. But at this time, I feel a slightly different approach would be needed.Try a third party (non official) app to burn the iso to the micro usb
eg ....unetbootin ....it is free and does not require password input......
Jim43