story: change root full

# Setup CHROOT
# =============
## copy 7 commands below then paste:
## Change /dev/sdxY to actual partition value eg. /dev/sda5

sudo mount /dev/sdxY /mnt/
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys
sudo mount --bind /dev/pts /mnt/dev/pts
If networking is needed: Open a new terminal and ->
sudo cp /mnt/etc/hosts /mnt/etc/hosts.old
sudo cp /etc/hosts /mnt/etc/hosts
sudo cp /etc/resolv.conf /mnt/etc/resolv.conf
exit
(The exit command at the end closes the new tab/window.)

sudo chroot /mnt/ /bin/bash

# =============
# Remove CHROOT
# =============
## Ctrl+d to exit chroot,
## copy 6 commands below then paste.
to restore the old hosts file if networking were inabled ->
cp /etc/hosts.old /etc/hosts
sudo umount /mnt/dev/pts
sudo umount /mnt/sys
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt

*side note :/etc/resolv.conf is nowadays managed by resolvconf, it'll automatically be generated when using NetworkManager and can safely be removed using rm /etc/resolv.conf