What if someone asked you to burn an ISO file to 13 USB drives ?
Richard Hughes, a GNOME developer, made an app to solve this
GNOME MultiWriter” and lets you write a single ISO or IMG to multiple USB drives at the same time.
On Ubuntu 14.10 you may also need to install the following packages first:
sudo apt-get install gnome-common yelp-tools libcanberra-gtk3-dev libudisks2-dev gobject-introspection
Download USB Multi Writer from here – https://github.com/GNOME/gnome-multi-writer