Creation of a LiveUSB key with Clonezilla
TuxBoot be used for this purpose.
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USB key with creating bootable system
You can create your own bootable key from an ISO file system
(linux, fedora, Ubuntu, PEbuilder, clonezilla,...)
Here are two examples of software that allows you to do :
Linux live USB creator et fedora liveusb creator.
Please select the USB support and choose the options.
Linux live usb creator is very easy to use.
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Fedora liveUSB creator is a similar and complementary software.
Here are two examples of software, but you can also refer you to other similar solutions (Ubuntu live usb creator...).