1. Download distro.iso
wget http://zenlab.org/isos/zendistro04/zendistro_040.iso
2. Insert USB key, and wait till is mounted.
3. See the device where are mounted USB key, using:
sudo fdisk -l
Note 1: Check with lsblk that the USB device is not mounted !
Note 2: Choose /dev/sdx instead of /dev/sdx1 !
These last 2 are very common mistakes!
4. If USB key is not formatted, remeber to format it using Fat 16 / Fat 32
E.g.
sudo mkfs.vfat -F 32 /dev/sdb
5. Install distro.iso from command line using:
sudo dd bs=4MB if=/path-iso-live.x.y.z-w.iso of=/dev/sdd
That´s all.