The options for installing Live ISO's to usb are...
3. set up the usb stick manually - see these guides:
use Gparted to make a Primary partition (FAT32) big enough for your ISO file + (optional) a small partition (FAT32) for any extra files.
- then run UNetbootin, select download or a local ISO file, the new partition, and fire away.
- on reboot you need to tell your BIOS to boot from the USB - hit it on the boot menu... also you may have to add USB to the menu in BIOS settings.
- Its best to wipe the files from the Live CD partition on the usb before installing a different ISO to it.
Note: for installing debian on a machine with only wireless available, it would be nice to have the driver files ready on the same usb drive.
So go back to Gparted, format some free space on the usb stick (FAT32) and use that for those firmware files
Note: if you need to resize a FAT32 formatted drive, you need to install
but likely you just need to wipe the partitions and make new ones.
get this script from their web-page http://multicd.tuxfamily.org/
it makes one .iso file of multiple LiveCD or utility .iso's which can then be put on a USB stick with UNetbootin, or the commands:
"sdb1" is an example, you can find your usb device name with `lsblk`
but what is the .iso file size limit?? and can it deal with multiple .iso's of the same Linux distro such as those made with Remastersys, or different downloaded versions?
This can install multiple live cd ISO's to a usb stick, (but I had one time it got stuck renaming "bad names" and took a long time -and then the grub was bad and another .iso needed to be added to fix it).
The best use of this is if you have different distros in use alot of the time (and of course, you have a large capacity USB stick). Even one or two distros and a couple of rescue bots would be good. But it can't load Remastersys ISO's of your own system. These days I don't test drive distros and all I use is my own Live Debian 64 and 32 bits versions, so for me its multiple USB sticks!
I hacked the install script they give on the site which basically adds the source and repo key
you can comment out with # after install - sudo nano /etc/apt/sources.list
install the key