is it possible to boot from the iso in grub2?

milomak

the iso is located in hd4,1

what would be the grub entry to boot from the iso in grub say is the iso is called solus.iso?

kyrios

Why not asking a web search engine?
This is the first result google returned. https://www.howtogeek.com/196933/how-to-boot-linux-iso-images-directly-from-your-hard-drive/

milomak

kyrios it would have been helpful if you provided a solution

milomak

kyrios

have you found a solution?

milomak

because different distros have different ways of dealing with isos.

more especially the linux and initrd files

menuentry "openSUSE Install" {
  set isofile=/openSUSE.iso
  set root=(hd4,1)
  loopback loop $isofile
  linux (loop)/boot/x86_64/loader/linux install=hd:$isofile
  initrd (loop)/boot/x86_64/loader/initrd
}

menuentry "Gentoo Linux Install" {
  loopback loop (hd4,1)/gentoo.iso
  linux    (loop)/isolinux/gentoo root=/dev/ram0 init=/linuxrc  dokeymap looptype=squashfs loop=/image.squashfs cdboot initrd=gentoo.igz vga=791
  initrd   (loop)/isolinux/gentoo.igz
}

menuentry 'ArchLinux Install' {
  set isofile='/archlinux.iso'
  loopback loop (hd4,1)$isofile
  linux (loop)/arch/boot/x86_64/vmlinuz archisodevice=/dev/loop0 img_dev=$imgdevpath img_loop=$isofile earlymodules=loop
  initrd (loop)/arch/boot/x86_64/archiso.img
}

i had also tried this but it didn't work

Justin

milomak He advised that there's likely a solution on the web already. This way of booting Solus is not supported and therefore not high on the list of the team to spend time looking for.

milomak

Justin

yeah he provided a solution that did not work

i accept if solus does not have the ability to boot fro iso in grub

but let's not pretend the answer i was given was a solution

Justin

milomak You weren't given an answer, merely a suggestion to see if Google has an answer. This is not a supported boot method for Solus so it isn't something the team has spent time investigating.

milomak

so another forum directed me to refracta2usb

that gave some hints which allowed the iso to boot (without a menu) but failed with what seemed like a kernel panic.

interestingly i also got a kernel panic when trying to install on another system via usb stick from the same iso though the sha file matched. where i used dd to burn the iso to usb stick.

the grub2 entry looked something like

set root=(hdx,y)
set isofile=/dir/to/solus.iso
loopback loop $isofile
linux (loop)/boot/kernel
initrd (loop)/boot/initrd.img root=live:CDLABEL=SolusLiveBudgie ro rd.luks=0 rd.md=0 quiet splash

it is the paramaters after initrd.img i think that matters. root is not found here. tried boot=live. that didn't work.