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I'm trying to boot various OS/Configurations of OS Install from a single USB. I've been using Multisystem, but it fails when I try to boot an install created with RemasterSys + Ubuntu 11.04.

It gives something like "please provide a name for this disk".

I tried copying in the ./disk folder into the directory for the install but it still fails.

Then I noticed that Ubuntu Desktop is boot directly via USB, so I copied the menu entry and modified the file names:

menuentry "Ubuntu Custom Install" {
    search --set -f "/customdist.iso"
    loopback loop "/customdist.iso"
    linux (loop)/casper/vmlinuz root=UUID=E56C-B453 debian-installer/locale=en_US.UTF-8 debian-installer/language=en kbd-chooser/method=en console-setup/layoutcode=us console-setup/variantcode= console-setup/modelcode=pc105 iso-scan/filename=/customdist.iso boot=casper file=/cdrom/preseed/custom.seed noprompt text --
    initrd (loop)/casper/initrd.lz

It gives something like file not found. I had customdist.iso under the root of the USB just like Ubuntu Desktop is. Also I noticed custom.seed is used so I changed that as well. Whats wrong?

Do you have any advice for "noobs" on how to start using GRUB2? I never really get what the commands like find, loopback or what the long line linux (loop)/casper/vmlinuz ... file=/cdrom/preseed/custom.seed noprompt text -- do.

I suppose the simplest is just to learn to boot everything from ISO?

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I've been looking into this myself and found panticz.de/MultiBootUSB but haven't tried it yet. – MRR0GERS Sep 19 '11 at 20:18
up vote 1 down vote accepted

I recently posted how to create a bootable USB with grub 2 and multiple OS choices using the MultiBootUSB shell script.

I can't guarantee it will work with your custom built RemasterSys install, but it's definitely worth a try and so far I'm pretty happy with my results. I have recreated my USB disk about 10 times now.

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Link above to darknet.co.za/blog/multiple-operating-system-live-usb.html currently 404s. – TomRoche Jun 13 '15 at 20:53
Thanks TomRoche, I have restored that page. – invert Jul 21 '15 at 11:45

I made a detailed tutorial regarding creation of a GRUB2 multiboot/multiISO LiveUSB. Feel free to fork and make pull request(s)!

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