How do I run WoeUSB on Ubuntu?

You can launch WoeUSB from Unity Dash or your application menu. It’s very easy to use the WoeUSB GUI. Select Windows ISO image and your target USB device. Make sure your data on the USB device is backed up before hitting the Install button.

Can I use Rufus on Linux?

Rufus is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is UNetbootin, which is both free and Open Source.