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Re: Trouble making bootable USB from ISO image

On Sat, May 04, 2019 at 01:50:31AM +0900, Mark Fletcher wrote:
> it auto-mounted.

> So as root I did:
> cp <ISO file> /dev/sdf

You need the device NOT to be mounted when you do the cp.  This may mean
you have to turn off your auto-mounter, or (better still) just log out of
your Desktop Environment entirely, and log in as root on a text console
for this operation.

If the device is mounted, that will interfere with the raw byte writing
you're doing.  The results are unpredictable.