Burning an ISO to USB or SD with Linux Using DD
While often you will make a USB or SD bootable device using a GUI utility this might not be as handy as using the command line or maybe you don't have access to anything but the command line. On Linux, the dd utility does a great job of making bootable removable devices with a minimum of effort.
One you have your ISO file ready, your command will look like this....
sudo dd bs=4M if=/myfiles/my.iso of=/dev/sdc
Assuming that "my.iso" is the name of your ISO file and that /dev/sdc is the device name of your USB stick or SD card.
Any reason for just using the bs=4M? I saw this too on the following link: