4
Collect any information about the state of NetworkManager in /var/log/
NetworkManager.
For more information about NetworkManager, refer to Chapter 5, Using NetworkMan-
ager (page 55).
9.6 Data Problems
Data problems are when the machine may or may not boot properly but, in either
case, it is clear that there is data corruption on the system and that the system needs
to be recovered. These situations call for a backup of your critical data, enabling you
to recover the system state from before your system failed. openSUSE oers dedi-
cated YaST modules for system backup and restoration as well as a rescue system
that can be used to recover a corrupted system from the outside.
9.6.1 Managing Partition Images
Sometimes you need to perform a backup from an entire partition or even hard disk.
Linux comes with the dd tool which can create a exact copy of your disc. Combined
with gzip you save some space.
Procedure 9.7 Backing and Restoring up Harddiscs
1
Start a Shell as user root.
2
Select your source device. Typically this is something like /dev/sda (labeled
as
SOURCE
).
3
Decide where you want to store your image (labeled as
BACKUP_PATH
). It must
be dierent from your source device. In other words: if you make a backup
from /dev/sda, your image le must not be stored under /dev/sda.
4 Run the commands to create a compressed image le:
dd if=/dev/
SOURCE
| gzip > /
BACKUP_PATH
/image.gz
5 Restore the hard disk with the following commands:
gzip -dc /
BACKUP_PATH
/image.gz | dd of=/dev/
SOURCE
If you only need a partition to backup, replace the
SOURCE
placeholder with your re-
spective partition. In this case, your image le can lie on the same hard disk, but on
a dierent partition.
9.6.2 Backing Up Critical Data
System backups can be easily managed using the YaST System Backup module:
Common Problems and Their Solutions 149
