I was installing hyperledger fabric, on Ubuntu 18.04.3 Desktop, through sudo -E, of this file https://raw.githubusercontent.com/hyperledger/fabric/master/scripts/bootstrap.sh and of another similar one.
But after installation, which seemed gone fine, I'm not able to use Ubuntu anymore, and when rebooting only an orange screen appears.
Through the iso-image usb, I accessed "Try Ubuntu" option, opened a terminal, and installed Boot-Repair tool.
Here the Boot-Repair Report I got: http://paste.ubuntu.com/p/KVg3BCSGpd/
Trying to follow the indications found here: Is there a way to boot from usb through grub menu? and here: https://www.youtube.com/watch?v=P3O_FjPu7vw
I edited:
grub rescue> ls
(hd0) (hd0, msdos1) (hd1) (hd1,msdos1)
grub rescue> ls (hd0)/
error: unknown filesystem
grub rescue> ls(hd0,msdos1)/
error: unknown filesystem
grub rescue> ls (hd1)/
error: unknown filesystem
grub rescue> ls (hd1,msdos1)/
error: unknown filesystem
grub rescue> set
cmdpath=(hd0)
prefix=(hd0,msdos1)/boot/grub
But the Boot-Repair says:
sda1:
File system: LVM2_member
Boot sector type: -
Boot sector info:
sdb1:
File system: LVM2_member
Boot sector type: -
Boot sector info:
ubuntu-vg-root:
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 18.04.4 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab
/boot/grub/i386-pc/core.img
ubuntu-vg-swap_1:
File system: swap
Boot sector type: -
Boot sector info:
Drive/Partition Info:
Drive: sda
Disk /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Partition Boot Start Sector End Sector # of Sectors Id
System
/dev/sda1 2,048 488,396,799 488,394,752 8e Linux LVM
In a terminal got with "Try Ubuntu" (iso image usb) I tried with sudo update-grub :
ubuntu@ubuntu: ~$ sudo update-grub
/usr/sbin/grub-probe: error: failed to get canonical path of '/cow'
I then followed this indications: Failed to get canonical path of /cow
I got then 'LVM2_member' :
ubuntu@ubuntu:~$ sudo mkdir /mnt/chroot
ubuntu@ubuntu:~$ sudo mount /dev/sda1 /mnt/chroot
mount: /mnt/chroot: unkown filesystem type 'LVM2_member'
But with vgdisplay
ubuntu@ubuntu:~$ sudo vgdisplay
-- Volume group --
VG Name ubuntu-vg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 0
Max PV 0
Cur PV 2
Act PV 2
VG Size <465,77 GiB
PE Size 4.00 MiB
VG UUID frpHze-BaQY-T18Q-u5dc-TJH2-NNyp-1T6SsT
ubuntu@ubuntu:~$ sudo lvscan
ACTIVE '/dev/ubunstu-vg/root' [<463.93 GiB] inherit
ACTIVE '/dev/ubuntu-vg/swap_1' [980.00 MiB] inherit
In a terminal with "Try Ubuntu" offered by the iso-image usb I tried:
ubuntu@ubuntu:~$ sudo su
root@ubuntu:/home/ubuntu# mount /dev/mapper/ubuntu--vg-root /mnt
root@ubuntu:/home/ubuntu# cd /mnt
root@ubuntu:/mnt# mount -t devtmpfs none dev
root@ubuntu:/mnt# mount -t sysfs none sys
root@ubuntu:/mnt# mount -t proc proc proc
root@ubuntu:/mnt# chroot .
chroot: failed to run command 'bin/bash': No such file or directory
root@ubuntu:/mnt# ls -lah /bin grep bash
-rwxr-xr-x 1 root root 1.1M Jun 6 2019 bash
Looking at these indications: https://unix.stackexchange.com/questions/338280/chroot-doesnt-find-bin-bash?rq=1
I read that it might be that "The file filename or a script or ELF interpreter does not exist, or a shared library needed for file or interpreter cannot be found". But how to practically resolve it?
Update:
perhaps the brutal-force copy of the entire /bin directory preserving all links into /mnt had made /bin/bash visible and usable by chroot: https://drive.google.com/open?id=13a9bgNYzvCzUC6dO1wR5Wx7KlvojVMri
But I got this error:
mapdevfs: error while loading shared libraries: libdebian-
installaer.so.4: cannot open shared object file: No such file or
directory
I tried again to re-install grub and got this error:
root@ubuntu:/# grub-install /dev/sda
Installing for i386-pc platform.
WARNING: Failed to connect to lvmetad. Falling back to device
scanning
Installation finished. No error reported.
root@ubuntu:/# grub-install /dev/sdb
Installing for i386-pc platform
WARNING: Failed to connect to lvmetad. Falling back to device
scanning
Installation finished. No error reported
https://drive.google.com/open?id=13bHrF1UGcWicVL4aXQfJm4N2odKdWp0B
This is the result of my very last attempt to update grub:
ubuntu@ubuntu:~$ sudo su
root@ubuntu:/home/ubuntu# mount /dev/mapper/ubuntu--vg-root /mnt
mount: /mnt: /dev/mapper/ubuntu--vg-root already mounted on /mnt.
root@ubuntu:/home/ubuntu# cd /mnt
root@ubuntu:/mnt# mount -t devtmpfs none dev
mount: /mnt/dev: none already mounted on /mnt/dev.
root@ubuntu:/mnt# mount -t sysfs none sys
mount: /mnt/sys: none already mounted on /mnt/dev.
root@ubuntu:/mnt# mount -t proc proc proc
mount: /mnt/proc: proc already mounted on /proc.
root@ubuntu:/mnt# chroot .
root@ubuntu:/# update-grub
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
Found linux image: /boot/vmlinuz-5.3.0-28-generic
Found initrd image: /boot/initrd.img-5.3.0-28-generic
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
Found linux image: /boot/vmlinuz-5.0.0-23-generic
Found initrd image: /boot/initrd.img-5.0.0-23-generic
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
mapdevfs: error while loading shared libraries: libdebian-installer.so.4:
cannot open shared object file: No such file or directory
log-output: error while loading shared libraries: libdebian-
installer.so.4: cannot open shared object file: No such file or directory
mapdevfs: error while loading shared libraries: libdebian-installer.so.4:
cannot open shared object file: No such file or directory
mapdevfs: error while loading shared libraries: libdebian-installer.so.4:
cannot open shared object file: No such file or directory
mapdevfs: error while loading shared libraries: libdebian-installer.so.4:
cannot open shared object file: No such file or directory
mapdevfs: error while loading shared libraries: libdebian-installer.so.4:
cannot open shared object file: No such file or directory
Adding boot menu entry for EFI firmware configuration
done
BIG UPDATE: rebooting the system now works fine. LESSON LEARNED: when ever install something new, check and verify it might produce some side-effects
Looking forward to your kind help. Marco
