I found this great article at Medium
How ti Use Linux DD Command to make ISO Bootable on USB Drive
/ use-unix-dd-command-to-os-bootable-on-usb-...
You can have a look at the partitions and file systems on the system with this command:
sudo fdisk -l
After then confirming which is your target drive, and unmounting ($ umount /dev/sdb*) it, we need to format the unmounted drive. Let’s do this formatting with:
sudo mkfs.ext4 /dev/sdb
or
sudo mkfs.vfat /dev/sdb1
Navigate to Downloads folder
cd ~/Downloads
then you can ls (list / take a look at) your file with:
$ ls *.iso
Use this command to start process.
sudo dd if=name-of-iso.iso of=/dev/sdb status="progress"
It will take 10-15 minutes.