booting Live .iso from Grub2
I am trying to boot live DamnSmallLinux .iso from GRUB2.
this is contents of 40_custom: Code:
menuentry "ISO - DSL" { How to make it work? |
Loop mount the DSL iso to find the kernel: First create a directory in your /home/user directory. mkdir test, then: mount -o loop dsl-4.4.10.iso test. You should then be able to see the DSL directories/files. The DSL version I have has the kernel in the / directory and it is called linux24. The initrd is minirt24.gz. Not sure these files will be the same in your version of DSL. The casper directory, as far as I know, is only used with Ubuntu and its derivatives.
The entry below is what I use to boot DSL off a CD, you'll likely need to modify it for Grub2: Quote:
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The entry I posted above is Grub Legacy on a CD so there is no title line. Your casper entry should probably be changed to knoppix.
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thanks, but in your example there is no path to .iso ?
also, grub2 says 'kernel' is unknown command, tried with 'linux' instead but still doesn't boot. |
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You will probably need to replace your casper entries with knoppix. You will also need to mount the iso image of DSL to find out what the kernel and initrd files are actually named. In the version of DSL I have, the kernel is "linux24" and the initrd is "minirt24.gz". You will also need to verify where the kernel and initrd files are. In the version I have, they are in root directory. The original error message from your first post is because it is looking for the kernel in the casper directory which does not exist. Also, it is probably named incorrectly. Find the correct name for the kernel by mounting the iso first. Quote:
You could try the entry below. Obviously, you will need to verify those are the correct kernel/initrd names and locations by mounting the iso. Check the isolinux.cfg entry on the mounted DSL iso to see what the entry is there and modify it if necessary. Quote:
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nope, doesn't work. I changed your "(loop)/linux24" to "(loop)/boot/isolinux/linux24" (and did the same for minirt) but computer just resets. seems like dsl simply isn't made to run this way?
:/ I found this interesting link: http://knol.google.com/k/yoshihide-n...zr3sm0dzndc/1# perhaps we also need modified 'initrd'? |
Didn't really think it would work and I guess the information in the link you posted pretty much explains why.
I haven't used Grub2 much. I put Ubuntu and several of its derivates on a DVD as iso files and booted them. Tried a couple of non-ubuntu without much luck. Did manage to get Parted Magic to boot from iso. Haven't really experimented much with this. |
just an update, found this useful file:
http://pendrivelinux.com/downloads/m...linux/grub.cfg they say that "Adding an Unlisted ISO: To try ISO Files that are not yet listed, use the existing menuentry examples in /boot/grub/grub.cfg and append any options normally found in the distributions syslinux.cfg file on the "append" line to the "linux" line of the menu entry. Please inform me of entries you get to work and I will add them to the list, so that others may benefit as well." I believe that if it works with USB it should work with HDD, too. |
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Post the menuentry you used for DSL. |
didn't make DSL work yet. the plan is to use usb installer and then grab its menuentry for DSL and knoppix.
perhaps it might be necessary to unpack .iso, we'll see. |
In your first post, you show the DSL iso as being in /boot/iso subdirectory of sda5 (hd0,msdos5).
If that is where the DSL iso is, leave the setisofile line as is. If your DSL iso is elsewhere, you will need to change that. Have you loop mounted the DSL iso to find where your kernel (linux24) actually is. The version I had showed it in the / directory and your entry shows it in /boot/isolinux: Quote:
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I don't have a DSL iso to test but do have the Parted Magic. The entry below boots pmagic iso from Ubuntu with Grub2.
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The loopback loop line may need to change. On my system, Ubuntu is on sda5 (hd0,5) and pmagic is in the / directory. If you have your DSL iso file elsewhere, you will need to change that to reflect where it actually is. If it doesn't boot from a subdirectory such as /boot/isolinus/, try putting the iso file in /. The linux (loop) line needs the isofrom=/dev/sda5/your dsl iso filename here. The entries above for pmagic will obviously not work. You will need to loop mount the DSL iso and get the correct lines from syslinux.cfg or isolinux.cfg. The append options will need to go on the linux (loop) line. |
well, I've installed this: http://www.pendrivelinux.com/multibo...sb-from-linux/
it created this grub2: Code:
menuentry "Damn Small Linux" { I've tried it. it loads kernel, then starts scanning usb drives. but complains 'cannot find knoppix filesystem, dropping you to very limited shell'. its the same type of problem with KnoppixV6.4.4 edit: if I understood this post correctly: http://www.knoppix.net/forum/threads...l=1#post115124 then my problem is that file 'KNOPPIX' (48.2Mb) is located on ext3 partition, not fat16. so then extlinux must be used? |
The entry in your last post should work to boot DSL from the usb but I doubt it will work from the drive. I though you wanted to boot the iso image? If you just want to boot DSL from the drive, install it to a partition and run sudo update-grub.
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The pendrive linux creates different directories during the installation than you will see on a standard install CD. Copy the dsl-4.4.10.iso to the root of sda5 before trying this. Haven't tested this as I don't have an iso file of DSL? |
no, I don't want to create a partition for DSL, it doesn't matter if its started as an .iso or some other way, as long as it lives in /boot/dsl.
/ belongs to Debian installation. no more partitions. |
Did you copy the dsl iso to the /boot/dsl directory and try the menuentry I suggested?
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Boot Damn Small Linux (DSL) from ISO file using grub2
While initially searching for this topic, this thread came at top of google search. Having figured out a way to boot DSL using grub2 from an ISO successfully, I thought I share it here for benefit of others (and OP if still relevant) who may be looking for this.
I wrote a shell script which extracts the ramdisk image inside the DSL .iso file and patches it so it can loop mount the .iso file on boot. The script is at https://gist.github.com/2041319 You also need cloop-decompress which is at https://gist.github.com/2040285 There is an example as a comment in the shell script. Good luck! |
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