Requirements
- Need an bootable ISO (disk image)
- Need an app to setup the key
- Need a USB key with 8.0 GB or more of space, preferably USB 3.0
Tools by platform
- Ubuntu: Startup Disk Creator (usually installed) [1]
- Windows: Rufus [2]
- Mac OS X/macOS: Etcher [3] [4]
[1] https://tutorials.ubuntu.com/tutorial/tutorial-create-a-usb-stick-on-ubuntu
[2] https://rufus.akeo.ie/
[3] https://etcher.io/
[4] https://tutorials.ubuntu.com/tutorial/tutorial-create-a-usb-stick-on-macos