Mount CD/DVD ISO or DVD ITSELF Type the following command to mount Fedora 12 iso image: # mount Fedora-12-x86_64-netinst.iso -o loop /media/cdrom0/ # DVD=/media/cdrom0 # ls -l $DVD Sample outputs: total 6 dr-xr-xr-x 3 root root 2048 2009-11-09 05:37 EFI drwxr-sr-x 3 root 499 2048 2009-11-09 05:37 images drwxr-sr-x 2 root 499 2048 2009-11-09 05:36 isolinux You need to use files stored in isolinux directory to create a bootable usb pen. Format Usb Create the fdisk partition : # fdisk /dev/sdb You need to create only 1 partition. Next format the partition: # USB=/media/usb # mkdosfs /dev/sdb1 Finally mount the partition: # mkdir -p /media/usb # mount /dev/sdb1 /media/usb # USB=/media/usb Copy Required Files Type the following commands: # cp -av $DVD/isolinux/* $USB # cd $USB # rm isolinux.bin boot.cat TRANS.TBL # mv isolinux.cfg syslinux.cfg Also copy the installer's initial RAM disk $DVD/images/pxeboot/initrd.img (for CentOS / RHEL Linux use $DVD/Re