Ubuntu 18.04 - Install Unetbootin
In previous versions of Ubuntu I had always install unetbootin by doing sudo apt install unetbootin, or just grabbing it from the software center. Unfortunately, I don't appear to have the software center on Ubuntu 18.04 mate, and running that command from the CLI didnt work for me.
Luckily you can just install from a PPA as shown below.
sudo add-apt-repository ppa:gezakovacs/ppa -y sudo apt-get update sudo apt-get install unetbootin -y