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Re: booting live cd images

From: Goh Lip
Subject: Re: booting live cd images
Date: Sat, 05 Jun 2010 10:28:06 +0800
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100423 Thunderbird/3.0.4

On 06/05/2010 03:32 AM, Piscium wrote:
Many Linux distros have live CD images available for download. Once downloaded 
the usual procedure is either to burn a CD with it, or else use a live usb 
creator to put the image on a pen drive. With both options the result is a way 
to boot the downloaded distro.

I wonder if there is a third way to boot. Would it be possible to have Grub 
boot the downloaded file (.iso) on the hard disk directly?

Yes, grub2 allows booting up using looping. Try googling for grub2 + loop.

If so, could it be done by modifying the grub configuration file (by editing 
40_custom)? Or by rebooting the PC, putting grub into interactive mode and 
entering the necessary commands?

The solution might involve the loopback command, but I don't know how to use 
it. And might involve chainloading to the bootloader on the image (isolinux).

No, it's not exactly chainload.
Any ideas?

There are different ways distros use these methods, casper, live, etc. Best check out their FAQ page to see which method they use. What works on one may not work on another. You can actually see this by mounting the iso and checking their boot. (mount -o loop xxxxxxxx.iso /mnt/xxx)

Regards - Goh Lip

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