Re: [DNG] reinstalling GRUB2
On 7/22/19 12:40 PM, Haines Brown wrote: So I do ... # chroot /sysroot # grub-install /dev/sdb bash grub-install: command not found # ls -la /usr/sbin | grep grub-install -rwxr-xr-x 1 root root 102046 Oct 28 2018 grub-install # /usr/sbin/grub-install /dev/sdb # bash: /usr/sbin/grub-install: No such file or directory At my wits end I remove and reinstall grub2-common. Did not help. That's pretty weird. If you reinstall the grub-pc package, it will run a debconf dialog and ask you where to put the bootloader. I don't know if it operates like that in alternate realities, and i think you might be in one. Check the size on your grub-install. It looks small. (Copy/paste error?) /usr/sbin/grub-install: ascii/uefi 1020496 Oct 28 2018 fsmithred ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
Re: [DNG] reinstalling GRUB2
On Mon, Jul 22, 2019 at 06:24:32AM -0400, fsmithred via Dng wrote: > On 7/22/19 1:48 AM, Steve Litt wrote: ... I tried the chroot method, but with little luck. I'm set up for BIOS boot. My /root partion is /sdb1, and my broken out /boot partition is /dev/sdb2. So for grub-root-device I use /dev/sdb1; for my grub-boot-device I use /dev/sdb. > > > 2) use these incantations, lifted from a post elsewhere : ... > > > chroot /sysroot > > > grub-install /dev/your-grub-boot-device (may be grub2-install on some > > > distro) So I do ... # chroot /sysroot # grub-install /dev/sdb bash grub-install: command not found # ls -la /usr/sbin | grep grub-install -rwxr-xr-x 1 root root 102046 Oct 28 2018 grub-install # /usr/sbin/grub-install /dev/sdb # bash: /usr/sbin/grub-install: No such file or directory At my wits end I remove and reinstall grub2-common. Did not help. ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
Re: [DNG] reinstalling GRUB2
Haines Brown wrote: > I tried the chroot method, but with little luck. ... ># chroot /sysroot > ># grub-install /dev/sdb >bash grub-install: command not found > ># ls -la /usr/sbin | grep grub-install >-rwxr-xr-x 1 root root 102046 Oct 28 2018 grub-install > ># /usr/sbin/grub-install /dev/sdb ># bash: /usr/sbin/grub-install: No such file or directory > > At my wits end I remove and reinstall grub2-common. Did not help. Sorry, it's outside my knowledge envelope. I know the steps do work as I've done them several times in the past. I don't know what the requirements are in terms of compatibility between the linux kernel that's booted and the "broken" system that you chroot to - are they the same architecture you are using ? Also, I take it you mounted all the directories (/proc, /dev, etc) ? In the back of my mind is whether the error message is a result of a lower level issue - eg a mismatch between kernel and system. ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
Re: [DNG] Firefox-esr freezes ASCII
On Tue, 9 Jul 2019 at 14:09, Edward Bartolo via Dng wrote: > To do normal browsing, I am using Waterfox which is Firefox without > the late many 'cool' additions. You can also try palemoon, I am using it for many things on devuan. -- Regards, Yevgeny ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
Re: [DNG] reinstalling GRUB2
On Mon, Jul 22, 2019 at 06:24:32AM -0400, fsmithred via Dng wrote: > On 7/22/19 1:48 AM, Steve Litt wrote: ... I tried the chroot method, but with little luck. I'm set up for BIOS boot. My /root partion is /sdb1, and my broken out /boot partition is /dev/sdb2. So for grub-root-device I use /dev/sdb1; for my grub-boot-device I use /dev/sdb. > > > 2) use these incantations, lifted from a post elsewhere : ... > > > chroot /sysroot > > > grub-install /dev/your-grub-boot-device (may be grub2-install on some > > > distro) So I do ... # chroot /sysroot # grub-install /dev/sdb bash grub-install: command not found # ls -la /usr/sbin | grep grub-install -rwxr-xr-x 1 root root 102046 Oct 28 2018 grub-install # /usr/sbin/grub-install /dev/sdb # bash: /usr/sbin/grub-install: No such file or directory At my wits end I remove and reinstall grub2-common. Did not help. ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
Re: [DNG] reinstalling GRUB2
Steve Litt wrote: > Simon Hobson wrote: >> 1) use grub rescue cd (which you can put on a USB stick). Then fairly >> easy to sort out by picking the right menu options. > > Do you mean: > > * Super Grub2 Disk (https://sourceforge.net/projects/supergrub2/) > * boot-repair-disk (https://sourceforge.net/p/boot-repair-cd/home/Home/) > * System Rescue CD (http://www.system-rescue-cd.org/) > * GrubEFIReinstall (https://wiki.debian.org/GrubEFIReinstall) > * Ultimate Boot CD (http://www.ultimatebootcd.com/) The first one, SuperGrub2 - more details at https://www.supergrubdisk.org And step-by-step guide at https://www.supergrubdisk.org/wizard-restore-grub-with-super-grub2-disk/ I suspect the others would also be suitable, but not ones I've used (for this) fsmithred via Dng wrote: > Steve Litt wrote: >> Simon Hobson wrote: > >>> >>> 2) use these incantations, lifted from a post elsewhere : >>> >>> mkdir /sysroot >>> mount /dev/your-root-dev /sysroot >>> mount /dev/your-boot-dev /sysroot/boot >>> mount --bind /dev /sysroot/dev >>> mount --bind /sys /sysroot/sys >>> mount --bind /proc /sysroot/proc >>> mount --bind /run /sysroot/run (recommended if you are using systemd) >>> chroot /sysroot >>> grub-install /dev/your-grub-boot-device (may be grub2-install on some >>> distro) >> *Exactly* what do you mean by "your-grub-boot-device"? Does it vary >> depending on MBR vs UEFI? > > Yes, it varies depending on BIOS vs. UEFI boot. For bios boot, the grub boot > device is the drive whose mbr you want to use, like /dev/sda or /dev/sdb. > > For UEFI, you don't name the device. Grub knows to put the bootloader in the > efi partition. In that case, an extra step above would be to mount the efi > partition to /sysroot/boot/efi > >> So now you've installed Grub(2), but then how do you configure grub? > > While you are still in the chroot, run: > > update-grub > > And that will make a new boot menu. Beat me to it ;-) This option will re-install Grub as long as you can boot the system from any disk containing a vaguely similar Linux - when you chroot you'll be using the tools/executables/etc from your "broken" system while running the kernel from your recovery system. So lets say you can boot a system from sda, and your "broken" one is currently showing as sdb - with boot as sdb1 and root as sdb2. the relevant lines from above would then become : mount /dev/sdb2 /sysroot mount /dev/sdb1 /sysroot/boot ... grub-install /dev/sdb And as fsmithred says, you can add update-grub to update the menu - this will work just as if you'd really booted from sdb. As to which method is "best", well that's a case of "horses for courses"* I've used both methods in the past (not for some time though). The first method is providing the bootable system and providing some assistance with the second method - probing disks, creating (IIRC) the chroot environment, etc. If you are able to boot the system then the second method is just a few commands (which you can do remotely, eg via SSH, if required); if you can't already boot the system at all then you'll need the boot disk to get it running. * A phrase meaning to pick the tool best suited for the job. Literally it's referring to the fact that different race horses will perform best at different courses (or under different conditions) so you pick the one that's best suited for the course/conditions. https://en.wiktionary.org/wiki/horses_for_courses ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
Re: [DNG] reinstalling GRUB2
On 7/22/19 1:48 AM, Steve Litt wrote: On Sun, 21 Jul 2019 20:25:42 +0100 Simon Hobson wrote: 2) use these incantations, lifted from a post elsewhere : mkdir /sysroot mount /dev/your-root-dev /sysroot mount /dev/your-boot-dev /sysroot/boot mount --bind /dev /sysroot/dev mount --bind /sys /sysroot/sys mount --bind /proc /sysroot/proc mount --bind /run /sysroot/run (recommended if you are using systemd) chroot /sysroot grub-install /dev/your-grub-boot-device (may be grub2-install on some distro) *Exactly* what do you mean by "your-grub-boot-device"? Does it vary depending on MBR vs UEFI? Yes, it varies depending on BIOS vs. UEFI boot. For bios boot, the grub boot device is the drive whose mbr you want to use, like /dev/sda or /dev/sdb. For UEFI, you don't name the device. Grub knows to put the bootloader in the efi partition. In that case, an extra step above would be to mount the efi partition to /sysroot/boot/efi So now you've installed Grub(2), but then how do you configure grub? While you are still in the chroot, run: update-grub And that will make a new boot menu. fsmithred ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
