Subj : Updating grub boot order
To : ARELOR
From : Dumas Walker
Date : Mon Sep 23 2019 07:33 pm
> My suggestion:
> insert the card or storage media of the sbc into
> a running system with a matching architecture,
> mount that card and chroot to it. ie:
> # mount /dev/your_card /mnt/whatever
> # mount -o bind,dev /dev /mnt/whatever/dev
> # mount -o bind,proc /proc /mnt/whatever/proc
> # mount -o bind,sys /sys /mnt/whatever/sys
> # chroot /mnt/whatever sh
> Now you are inside the operating system of the
> card. Configure the bootloader to your leissure
> . You may also want to give other boot loaders
> a try, such as Lilo or Syslinux, which imo are
> way more sane for small simple setups.
That is a great idea, thanks! BTW, I remember that I had a cable for it,
serial-to-USB, I think, that allowed me to plug it in as a USB device and
boot it that way. It did boot, but the logon program is issuing a seg
fault when I try to log on! I am guessing the networking is also hosed,
which is why I could not connect via SSH or get it to respond to a ping
request.
I am guessing that chrooting it is not going to fix that issue with the
logon program. I think I really hosed something up. I think I rebooted it
at the wrong time during the upgrade. It had installed the new kernel but
I was doing a "limited space" upgrade where you do an "apt-get upgrade" and
then "dist-upgrade." Since the kernel had updated, I thought I should
reboot but I had only done the first of the two steps. No telling what
state I left it in. :(
Either that, or there is a problem with the board now. Seg faults can be
caused by a hardware issue, but I am hoping it is either my "bad state"
theory or an issue with the SD card.
