I have a notebook which can't boot up Ubuntu and I want to copy all of the files to an external hard drive with USB connection to save them. After I want to install a new Ubuntu to the notebook, how can I copy all of the files to an external hard drive using just the
grub console, or
sudo lsblk sudo: lsblk: command not foud sudo vgscan No volume groups found sudo lvs No volume groups found
Is this possible?