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Is Unetbootin capable of making any iso file bootable

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Is Unetbootin capable of making any iso file bootable

1)It is a great experience to achieve what I got today. I had downloaded GParted iso file (135 MB size). Now to make a bootable usb of it, I used unetbootin and to surprise I succeded in entering Gparted application and modified my partitions.
Earlier I was in a notion that it is used only for installing Linux by making bootable usb,etc. so, can it be used for any iso?

2)As I had earlier installed OS, I had to specify where I want to install it. But in this case (point 1) where I made bootable usb of Gparted iso: when I booted my system by doing the appropriate BIOS set up, It didn't ask me where to install Gparted. Directly I entered the Gparted application. So, please clarify me what happened in this case. Did it install in USB drive only?

3) When I entered the gparted application, there I opened a terminal. When I entered command
shutdown -h now

it asked me for root password. Because while booting from usb, it nowhere asked me for root credentials. so what is root password.
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LIVEMEDIA-CREATOR(1)					      General Commands Manual					      LIVEMEDIA-CREATOR(1)

livemedia-creator - Create live install media
livemedia-creator [-h] (--make-iso | --make-disk | --make-fsimage | --make-appliance | --make-ami) [--iso ISO] [--disk-image DISK_IMAGE] [--fs-image FS_IMAGE] [--ks KS] [--image-name IMAGE_NAME] [--image-only] [--keep-image] [--no-virt] [--proxy PROXY] [--anaconda-arg ANACONDA_ARGS] [--armplatform ARMPLATFORM] [--location LOCATION] [--logfile LOGFILE] [--lorax-templates LORAX_TEMPLATES] [--tmp TMP] [--resultdir RESULT_DIR] [--app-name APP_NAME] [--app-template APP_TEMPLATE] [--app-file APP_FILE] [--ram MEMORY] [--vcpus VCPUS] [--vnc VNC] [--arch ARCH] [--kernel-args KERNEL_ARGS] [--dracut-arg DRACUT_ARGS] [--title TITLE] [--project PROJECT] [--releasever RELEASEVER] [--volid VOLID] [--squashfs_args SQUASHFS_ARGS]
livemedia-creator uses Anaconda, kickstart and Lorax to create bootable media that use the same install path as a normal system install. It can be used to make live isos, bootable (partitioned) disk images and filesystem images for use with virtualization. The general idea is to use virt-install to install into a disk image and then use the disk image to create the bootable media. livemedia-creator --help will describe all of the options available. At the minimum you need: --make-iso to create a final bootable .iso --iso to specify the Anaconda install media to use with virt-install --ks is the kickstart to use to install the system
: -h, --help show this help message and exit --make-iso Build a live iso --make-disk Build a partitioned disk image --make-fsimage Build a filesystem image --make-appliance Build an appliance image and XML description --make-ami Build an ami image --iso ISO Anaconda installation .iso path to use for virt-install --disk-image DISK_IMAGE Path to disk image to use for creating final image --fs-image FS_IMAGE Path to filesystem image to use for creating final image --ks KS Kickstart file defining the install. --image-name IMAGE_NAME Name of fs/disk image to create. Default is a random name. --image-only Exit after creating fs/disk image. --keep-image Keep raw disk image after .iso creation --no-virt Use Anaconda's image install instead of virt-install --proxy PROXY proxy URL to use for the install --anaconda-arg ANACONDA_ARGS Additional argument to pass to anaconda (no-virt mode). Pass once for eachargument --armplatform ARMPLATFORM the platform to use when creating images for ARM, i.e., highbank, mvebu, omap,tegra, etc. --location LOCATION location of iso directory tree with initrd.img and vmlinuz. Used to run virt-install with a newer initrd than the iso. --logfile LOGFILE Path to logfile --lorax-templates LORAX_TEMPLATES Path to mako templates for lorax --tmp TMP Top level temporary directory --resultdir RESULT_DIR Directory to copy the resulting images and iso into. Defaults to the temporaryworking directory --title TITLE Substituted for @TITLE@ in bootloader config files --project PROJECT substituted for @PROJECT@ in bootloader config files --releasever RELEASEVER substituted for @VERSION@ in bootloader config files --volid VOLID volume id --squashfs_args SQUASHFS_ARGS additional squashfs args
: --app-name APP_NAME Name of appliance to pass to template --app-template APP_TEMPLATE Path to template to use for appliance data. --app-file APP_FILE Appliance template results file. VIRT-INSTALL ARGUMENTS: --ram MEMORY Memory to allocate for installer in megabytes. --vcpus VCPUS Passed to --vcpus command --vnc VNC Passed to --graphics command --arch ARCH Passed to --arch command --kernel-args KERNEL_ARGS Additional argument to pass to the installation kernel
: --dracut-arg DRACUT_ARGS Argument to pass to dracut when rebuilding the initramfs. Pass this once foreach argument. NOTE: this overrides the default.
Documentation in /usr/share/docs/lorax/README.livemedia-creator
Brian C. Lane 2013-07-26 LIVEMEDIA-CREATOR(1)

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