HOWTO: Rescue system
1) Boot from DVD and login as root
root
2) Mount root partition
mount /dev/sda2 /mnt
3) Make installed system aware of available hardware
for i in /sys /proc /run /dev; do mount --bind "$i" "/mnt$i"; done
4) Change root to installed system
chroot /mnt
5) Mount DVD (see Mount DVD)
mkdir -p /media/dvd
mount /dev/sr0 /media/dvd
6) Activate network
dhcpcd -N eth0
7) Start yast, zypper to repair system
https://forums.opensuse.org/content/146-using-livecd-take-over-repair-installed-system.html http://blog.pdark.de/2010/08/01/starting-the-network-with-opensuses-rescue-system/