CentOS uses dd command to make U disk boot disk
Download ISO file
dd if=/ntfs/linux_all/sys/CentOS-7.0-1406-x86_64-DVD.iso of=/dev/sdb
Note that it is /dev/sdb not /dev/sdb1, no test appears: isolinux.bin missing or corrupt error
Open a new terminal again to see the progress:
# while killall -USR1 dd; do sleep 5; done
refer to: