The USB or SD image needs to be written on a USB or SD device.
On Windows™, download Disk Imager, uncompress it and execute the software. Plug in a USB key or an SD card (1GB min), select it and select the Linutop .img file. Click the button.
On Linux systems, use the following command, where /dev/sdX if the name of the device:
$ dd if=linutop-demo-latest.img of=/dev/sdXIn order to determine the proper device name for the usb key or SD, you can use the lsblk command:
Be carefull to select the correct device.