I have rebuild my Ubuntu 14.04.1 installation as the USB drive which contained the boot partition crashed. I have a recent backup of all of
/ except for
/proc /sys /mnt /media /run /tmp /dev.
Starting from a clean 14.04.1 installation, I have tried copying the entire contents of the tar archive over the new installation. It core dumped, when copying the
I copied the directories from the tar archive individually and managed to get almost all files to copy apart from some
/sbin executables, which were in use. But when I rebooted, it did not boot up and never reached a command prompt.
Is there a better way to use the tar archive to recover the system? Do I have to ensure that the new USB boot drive is physically the same size? Should I pick some key config files/directories to restore rather than the whole archive? If so, which ones?