If you are a GNU/Linux user, their is a high chance that you have used live media images i.e. live CD, live DVD or ISO. I was curious about how live images are created and recently got a chance to do some hands on.
There are multiple tools available for creating live media. However I am going to use livecd-tools to create live ISO. livecd tools need kickstart files to create the images and we will use CentOS upstream kickstart files .
As a first step install livecd-tools . I using CentOS Vagrant box to create live ISOs.
$ sudo yum install livecd-tools git -y $ git clone https://github.com/CentOS/sig-core-livemedia $ cd sig-core-livemedia/kickstarts #You can use any one of the .cfg files in /sig-core-livemedia/kickstarts $ livecd-creator --config <Kickstart file>
If you are new to kickstart files and want to know more about it refer the documentation: https://github.com/rhinstaller/pykickstart/blob/master/docs/kickstart-docs.rst