In this blog post, I’ll show you how to create a USB boot stick on an Ubuntu Linux system. The prerequisite is that an Ubuntu image file has been downloaded.
After downloading, the image file will typically be located in the „Downloads“ folder. You should leave it there, as it will be automatically detected (more on that shortly).
To create a bootable USB stick, you can use the application Startup Disk Creator, which is not installed on Ubuntu by default. So let’s add it:
sudo apt install usb-creator-gtk
Now plug in your USB stick and start the Startup Disk Creator program.

As you can see in the screenshot, both the USB stick and the image file (as long as it’s in the Downloads folder) will be detected automatically. You can then click on „Make Startup Disk“ to begin. After entering your user password, the disk image will be written.

Once the image has been created, the USB stick can be used to boot and install Ubuntu on another computer.