One of the biggest hassles for me, as a Linux user and hobbyist, has been creating bootable flash drives to use as live and/or installation media.

Unetbootin works but "not always" and figuring out the proper syntax to use from the command line always boggles my mind.

Here's the solution. Seriously, this stand-alone app worked for me and was super easy to use. It's also available for both Windows and Linux.

https://www.balena.io/etcher/