Exercise 34.5: Recovering Using the Install Image on Debian/Ubuntu

Hi Luis,

Thank you very much. With the Debian iso I managed it to install the according zsh packages.

In calse someone else will have to do that too, or you consider to update this course, these are the steps which I made:

1. Downloading the latest full Debian iso.
2. Booting into the Ubuntu install media.
3. Open the terminal and do as follows.

ubuntu@ubuntu:~$ lsblk
NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0                       7:0    0   1.6G  1 loop /rofs
loop1                       7:1    0   471M  1 loop 
loop2                       7:2    0 874.4M  1 loop 
loop3                       7:3    0     4K  1 loop /snap/bare/5
loop4                       7:4    0 269.8M  1 loop /snap/firefox/4793
loop5                       7:5    0  10.7M  1 loop /snap/firmware-updater/127
loop6                       7:6    0 505.1M  1 loop /snap/gnome-42-2204/176
loop7                       7:7    0  38.8M  1 loop /snap/snapd/21759
loop8                       7:8    0  74.3M  1 loop /snap/core22/1564
loop9                       7:9    0   500K  1 loop /snap/snapd-desktop-integration/178
loop10                      7:10   0 149.6M  1 loop /snap/thunderbird/507
loop11                      7:11   0 116.8M  1 loop /snap/ubuntu-desktop-bootstrap/237
loop12                      7:12   0  10.5M  1 loop /snap/snap-store/1173
loop13                      7:13   0  91.7M  1 loop /snap/gtk-common-themes/1535
sr0                        11:0    1   5.8G  0 rom  /cdrom
sr1                        11:1    1   3.7G  0 rom  
vda                       253:0    0   128G  0 disk 
├─vda1                    253:1    0     1M  0 part 
├─vda2                    253:2    0     2G  0 part 
└─vda3                    253:3    0   126G  0 part 
  └─ubuntu--vg-ubuntu--lv 252:0    0   126G  0 lvm  
ubuntu@ubuntu:~$ cd /mnt
ubuntu@ubuntu:/mnt$ sudo mkdir sr{0,1} sysimage
ubuntu@ubuntu:/mnt$ ls
sr0  sr1  sysimage
ubuntu@ubuntu:/mnt$ sudo su
root@ubuntu:/mnt# mount /dev/sr0 /mnt/sr0
mount: /mnt/sr0: WARNING: source write-protected, mounted read-only.
root@ubuntu:/mnt# mount /dev/sr1 /mnt/sr1
mount: /mnt/sr1: WARNING: source write-protected, mounted read-only.
root@ubuntu:/mnt# vgscan
  Found volume group "ubuntu-vg" using metadata type lvm2
root@ubuntu:/mnt# vgchange -ay
  1 logical volume(s) in volume group "ubuntu-vg" now active
root@ubuntu:/mnt# lvs
  LV        VG        Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ubuntu-lv ubuntu-vg -wi-a----- <126.00g                                                    
root@ubuntu:/mnt# lvdisplay 
  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/ubuntu-lv
  LV Name                ubuntu-lv
  VG Name                ubuntu-vg
  LV UUID                w50odd-lx32-TSbE-KtHx-tXiO-5nzY-DBx7iB
  LV Write Access        read/write
  LV Creation host, time ubuntu, 2024-10-29 07:36:06 +0000
  LV Status              available
  # open                 0
  LV Size                <126.00 GiB
  Current LE             32255
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:0

root@ubuntu:/mnt# mount /dev/ubuntu-vg/ubuntu-lv /mnt/sysimage/
root@ubuntu:/mnt# ls
sr0  sr1  sysimage
root@ubuntu:/mnt# cd sr1
root@ubuntu:/mnt/sr1# ls
boot    dists  firmware     isolinux    pool                 README.mirrors.txt
css     doc    install      md5sum.txt  README.html          README.source
debian  EFI    install.amd  pics        README.mirrors.html  README.txt
root@ubuntu:/mnt/sr1# find . -name '*zsh*'
./pool/main/z/zsh
./pool/main/z/zsh/zsh_5.9-4+b5_amd64.deb
./pool/main/z/zsh/zsh-common_5.9-4_all.deb
root@ubuntu:/mnt/sr1# dpkg --root=/mnt/sysimage/ --install /mnt/sr1/pool/main/z/zsh*.deb
dpkg: error: cannot access archive '/mnt/sr1/pool/main/z/zsh*.deb': No such file or directory
root@ubuntu:/mnt/sr1# dpkg --root=/mnt/sysimage/ --install /mnt/sr1/pool/main/z/zsh/zsh*.deb
Selecting previously unselected package zsh.
(Reading database ... 211566 files and directories currently installed.)
Preparing to unpack .../z/zsh/zsh_5.9-4+b5_amd64.deb ...
Unpacking zsh (5.9-4+b5) ...
Selecting previously unselected package zsh-common.
Preparing to unpack .../z/zsh/zsh-common_5.9-4_all.deb ...
Unpacking zsh-common (5.9-4) ...
Setting up zsh-common (5.9-4) ...
Setting up zsh (5.9-4+b5) ...
Processing triggers for debianutils (5.17build1) ...
Processing triggers for man-db (2.12.0-4build2) ...
root@ubuntu:/mnt/sr1#

4. Remove the Ubuntu install media and reboot the system.

Thanks again, Luis!

Best wishes,
Urs