UNETBOOTIN

UNETBOOTIN is used to make bootable pen drive(USB) for various distributions.
1> Install Unetbootin
        sudo apt-get install unetbootin

2>After installation goto
      Applications ->System Tools ->Unetbootin

3>Then select the distribution and version for already downloaded installation cd (ISO)
4> Check on ISO in disk image option and browse the source file for distribution(i.e iso to be copied on usb)
5> Click OK will extract the ISO image of distribution and copy it on USB
6> After completion, then select Reboot now, and it will reboot the system.
7> Go to BIOS and change boot option.


NOTE : For more information goto :a)http://www.howtogeek.com/howto/linux/create-a-bootable-ubuntu-usb-flash-drive-the-easy-way/
                                              b)http://unetbootin.sourceforge.net/