#become root and super user
$ sudo -i
#find disks
$ fdisk -l
and its result witll be:
Disk /dev/sda: 256.1 GB, 256060514304 bytes, 500118192 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000b941d
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 270020607 133960704 8e Linux LVM
Before writting ISO to USB device, make sure USB device is unmounted. To unmount:
$umount /dev/sdb1
$umount /dev/sdb2
if a particion is not mounted, the result will :
$umount /dev/sdb2
umount: /dev/sdb2: not mounted
$dd bs=4M if=/WHERE_ISO_LOCATED/NAME_OF_ISO.iso of=/dev/sdb
The result will be:
1121+1 records in
1121+1 records out
4704262144 bytes (4.7 GB) copied, 400.12 s, 11.8 MB/s