Bootable flash drive for ubuntu [duplicate]

I'm trying to make my usb flash drive to a bootable stick. I've downloaded the ubuntu 16.10 iso and whenever I try to make it with startup disk creator this error occure. What should I do?

Note : This assumes that you are on Linux(Ubuntu) platform.

To create a USB stick from which you can install Ubuntu, you must first download Ubuntu of the flavor you want.

Then, follow these instructions:

1. Insert a USB stick with at least 2GB of free space.

2. Open the dash and search for Startup Disk Creator.

3. Select the Startup Disk Creator to launch the app.

   

4. Click Other to choose the downloaded ISO file if it isn’t found automatically, select the file and click Open.

   

5. Select the USB stick in the bottom box and click Make Startup Disk and then Yes.

   

6. That's it! When the process completes, you'll be ready to restart your computer and begin installing Ubuntu.

You can make a bootable Ubuntu stick by running sudo udevadm monitor and inserting the usb stick. This will tell you where your usb stick is located in the /dev directory. Then run dd if=/path/to/ubuntu.iso of=/dev/sdX where X is the dev directory node that you saw from the previous command when inserting your usb stick. Then boot it!