How-to make a bootable USB stick using DD

jaydul · 04-13-2015, 03:03 AM

Hello
I want to make CentOS-7 ISO to my pen drive.I had try this now But it not woks How to make pen drive as boot CD for centOS 7 I m using now Red Hat 6.

PHP Code:



dd if=CentOS-7-x86_64-DVD-1503-01.iso of=/dev/sdb1

PHP Code:



/dev/sda1               495844     30604    439640   7% /boot 
/dev/mapper/vg_tuhin-lv_home 
                     251551508   8620468 230152956   4% /home 
/dev/sdb1              4209322   4209322         0 100% /media/CentOS 7 x86_64

onlyesterday16 · 04-13-2015, 03:17 AM

try of=/dev/sdb not /dev/sdb1.

or use syslinux:
http://askubuntu.com/questions/37260...-from-terminal
hope this helps

vincix · 04-13-2015, 03:45 AM

I agree, and moreover, unmount your usb stick before you do it.

jaydul · 04-13-2015, 03:58 AM

Hello I had try it

Code:

sudo dd if=/root/Downloads/CentOS-7-x86_64-DVD-1503-01.iso of=/dev/sdc bs=1M

Quote:

Originally Posted by onlyesterday16

try of=/dev/sdb not /dev/sdb1.

or use syslinux:
http://askubuntu.com/questions/37260...-from-terminal
hope this helps

pan64 · 04-13-2015, 04:23 AM

I do not know that iso, but probably that simply does not work, cannot boot it from usb. It depends on the content of the iso.
Anyway: /dev/sdc may work, /dev/sdc1 will never work.

brianL · 04-13-2015, 05:57 AM

Try this:

Code:

isohybrid /root/Downloads/CentOS-7-x86_64-DVD-1503-01.iso

then:

Code:

dd if=/root/Downloads/CentOS-7-x86_64-DVD-1503-01.iso of=/dev/sdc bs=1M

http://www.syslinux.org/wiki/index.php/Isohybrid

jefro · 04-13-2015, 03:03 PM

http://wiki.centos.org/HowTos/InstallFromUSBkey Would work if you wanted to use install from usb.

If you simply want to have centos on a usb then I tend to use a virtual machine without a virtual hard drive. Then take the install iso and boot to it in the vm. Attach usb and install to the usb.

Hactar · 04-13-2015, 03:59 PM

@ jaydul

Goto http://www.pendrivelinux.com/ and scroll down and click on any of the tabs to learn how to make a bootable usb drive using software either in inux or in windows.