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Backup of RHEL server

Dear All,
I want to take backup of my RHEL server so that in case any fault I can replace all setting correctly.

I am using squid,nis,samba on it.

Thanks All,
Please give me suggestion for that.
Thanks Again,

Rajendra

I find that cpio is great for doing a "live" system backup.

For example: To backup my Fedora system, I would boot into FC5 and save a backup image onto another hard drive partition ...

Code:

(cd /; find . -xdev | cpio -voc > /mnt/backup/linux.cpio.gz)

Now the restore operation kind of assumes that your system has been hosed. Therefore, you need to do the restore from a livecd or another system which is still working.
For example: To restore my FC5 to /dev/sda1 ...

Code:

mkfs.ext3 /dev/sda1

mkdir /mnt/mudd

mount /dev/sda1 /mnt/mudd

(cd /mnt/mudd; cpio -vicdm < /mnt/backup/linux.cpio.gz)

I also find partimage to work very nicely for system backup/restore.