bootisosystem-installationusb
Say I have two systems A and B.
I have installed Ubuntu 12.04 on system A and need same set of settings in system B, for which I am thinking to make a bootable iso from System A(creating as a backup). so that I can make Live USB from the generated iso and boot the System B which will be now the replica of System A.
Could you please tell is there any method or tool in doing this process?
Creating and installing Multiple Distros in to USB / Pendrive involves two parts:-
"After googling around for few days i found this useful script from www.multicd.tuxfamily.org. Multicd.sh is a shell script written by maybeway36 which enables two or more Live Linux distros / utilities to be able to boot from single CD/DVD. It is really very simple to create multi Live Linux distro in a single disc. Create a folder in your home folder and name it as multicd. Put all the live Linux iso images along with multicd.sh script inside multicd folder. Close the window. Open terminal and give the following commands
cd multicd chmod +x multicd*.sh sudo ./multicd*.sh
Above commands will execute multicd.sh. While executing, this script will download few packages from Internet and make a new iso image called multicd.iso for you inside multicd folder. Check the size of multicd.iso image file. If it exceeds more than 700 mb then you must insert DVD to write it. Choose burn image option from your favorite image burning software to write multicd.iso file. Upon reboot, with the CD/DVD present inside CD/DVD drive, new GRUB will display list of live distros available in the disc. Choose your favorite one to login...
Note: When you download any Linux iso image from internet it will look like this "ubuntu-9.04-desktop-i386" but this has to be renamed as ubuntu.iso (inside multicd folder). Presently this script supports 20 live distros. List of Live Linux distros supported in this script are given below (and the names accepted by this script are on the right side of each distro)."
There's a list of distro's on the blog page.
UNetbootin allows you to create bootable Live USB drives for Ubuntu, Fedora, and other Linux distributions without burning a CD. It runs on Windows, Linux, and Mac OS X. You can either let UNetbootin download one of the many distributions supported out-of-the-box for you, or supply your own Linux .iso file if you've already downloaded one or your preferred distribution isn't on the list.
Support amongst others: Ubuntu (and official derivatives) 8.04 LTS 9.10 10.04 LTS 10.10 11.04 Daily CD Images, Fedora 10, 11, 12, 13, 14, Rawhide and lots lots more.
If you look at them image you can choose distro's or download ISO's yourself and add them or add a custom. And you can set this up on a hard disc or a USB flash drive.
I hope it is enough information but there is a lot more info on this blog.
To create an image from a drive
sudo dd if=/dev/sdx of=/path/to/new.iso
Alternatively, to create a USB drive from an image
sudo dd if=/path/to/iso of=/dev/sdx
Replace /dev/sdx with your USB drive, e.g. /dev/sdc.
WARNING: It is imperative that you make certain you are using the correct drive. If you don't use the correct drive, you could lose your data. To check your currently mounted drives, use the command lsblk.
Note: Copying large files (1 GB or higher) can take a long time, be patient.
Best Answer
You have many tools that are available for Ubuntu 12.04(some of them are not used anymore for newer versions. but still works for ubuntu 12.04).
And much more.
I personally advise you to use Relinux.
Download this version from launchpad and not the last version to use the following tutorial on it
Here is a great tutorial how to use.