Quick Start Guide
mount /dev/sda6 /mnt
mount --bind /dev /mnt/dev
2 Now you can “change root” into the new environment:
chroot /mnt
3
Then mount /proc and /sys:
mount /proc
mount /sys
4 Finally, mount the remaining partitions from the installed system:
mount -a
5 Now you have access to the installed system. Before rebooting the system,
unmount the partitions with umount -a and leave the “change root” environ-
ment with exit.
WARNING: Limitations
Although you have full access to the les and applications of the installed system,
there are some limitations. The kernel that is running is the one that was booted
with the rescue system, not with the change root environment. It only supports
essential hardware and it is not possible to add kernel modules from the installed
system unless the kernel versions are exactly the same. Always check the version
of the currently running (rescue) kernel with uname -r and then nd out if a
matching subdirectory exists in the /lib/modules directory in the change root
environment. If yes, you can use the installed modules, otherwise you need to
supply their correct versions on other media, such as a USB stick. Most often the
rescue kernel version diers from the installed one — then you cannot simply
access a sound card, for example. It is also not possible to start a graphical user
interface.
Also note that you leave the “change root” environment when you switch the
console with [Alt] + [F1] to [Alt] + [F6].
Modifying and Reinstalling the Boot Loader
Sometimes a system cannot boot because the boot loader conguration is corrupted.
The start-up routines cannot, for example, translate physical drives to the actual lo-
cations in the Linux le system without a working boot loader.
To check the boot loader conguration and reinstall the boot loader, proceed as fol-
lows:
266 Start-Up