A boot disk is a removable storage device, such as a USB drive or a CD-ROM, that contains a bootable operating system. You can use a boot disk to boot a Linux system in the event that the system's primary boot device is not functioning properly, or to install a new operating system.
To create a boot disk under Red Hat or Fedora Linux, you can use the livecd-creator utility. This utility allows you to create a bootable live CD or USB drive from a Fedora or Red Hat installation.
To create a boot disk with livecd-creator, you will need to install the livecd-tools package. You can do this by running the following command:
sudo yum install livecd-tools
Once the livecd-tools package is installed, you can use the livecd-creator command to create a boot disk. For example, to create a bootable USB drive with the livecd-creator utility, you can use the following command:
livecd-creator --fslabel=BOOT_DISK --config=config.ks --cache=/var/cache/live
Replace BOOT_DISK with the label for the boot disk, and config.ks with the path to the Kickstart configuration file.
This will create a bootable USB drive with the specified label and the specified Kickstart configuration. You can then use the boot disk to boot a Linux system or install a new operating system.
It is important to note that the livecd-creator utility is only available on Red Hat and Fedora systems. If you are using a different Linux distribution, you may need to use a different tool to create a boot disk.