Issue with burning Linux .iso file using Disk Utility
I don't think Disk Utility will let you "burn" an ISO to a hard drive. It might let you "restore" the content to the drive. Select the ISO image in the right-hand side, then drag and drop the hard drive into the "Destination" field and click "Restore". I don't have a device here to test, but that might work.



Normally people "burn" ISO images to CDs or DVDs, or write them to USB memory sticks. If you have one of them available here are the relevant instructions for Ubuntu (these instructions should work for other Linux distributions too). I've done both countless times and can confirm that they do work.


How to burn a DVD on OS X
How to create a bootable USB stick on OS X