The README file of package grml-rescueboot says it all:
The Debian Package grml-rescueboot
Usually systems are rescued with CD or USB stick. grml-rescueboot makes
it possible to simply copy an Grml ISO image to the harddisk and boot the
rescue image. This eliminates the need to carry around a USB stick
to rescue a system as long as the hard disk and the boot manager still
grml-rescueboot includes the script 42_grml which is installed in
/etc/grub.d and run when update-grub is executed. The script looks for
ISO images in /boot/grml/ and adds an entry for each image found.
- Get a recent Grml image from http://grml.org/download/
- Copy the image to /boot/grml
- Run update-grub
- Reboot and enjoy your new rescue system
grml-rescueboot uses the loopback feature of GRUB2, so it won't work
with legacy GRUB. Furthermore the ISO image needs to support
loopback.cfg, a file which is placed in /boot/grub/. Grml supports
loopback.cfg beginning with release version 2010.04.
More technical details can be found here:
Create your own ISO
i quite often have systemrescuecd laying around, and an extra slitaz or crunchbang (or slackware, and in the past, even arch) installed on a partition to serve in a similar fashion. but this is really nice. grml is an excellent choice, and having it on hd as your emergency system is a nice touch. and that's a really really nice way of having it. no need for a separate partition etc. very nice. thnx for that xaos52.
Nice! I'm going to do this, then rid myself of the stench of rotten burgers. Thanks.
Works as advertised.
"It does not require many words to speak the truth." - Chief Joseph, Nez Perce tribe