LiveCdRecovery for apt install and other fixes

livecd-recovery.bash

# Boot the Ubuntu Live CD.
# https://help.ubuntu.com/community/LiveCdRecovery
# Press Ctrl-Alt-F1
chr=/mnt/
sudo mount /dev/sda1 $chr

sudo mount --bind /dev $chr/dev

sudo mount --bind /proc $chr/proc

sudo mount --bind /sys $chr/sys

# This is needed for connecting to internet.
# If below command fails due to existing files, one should fix by moving/deleting the file.
sudo cp /etc/resolv.conf $chr/etc/resolv.conf

sudo chroot $chr
# >> Inside chroont
apt update

apt upgrade

# << End Inside chroot