Backup restore on empty hdd
 

Hi, i have a full system archive(slack 10.2) which i have made with this command:
# tar cvpzf /arj/system.tar.gz --directory / --exclude=proc --exclude=arj --exclude=tmp

My question is how to restore whole system in empty hdd(hdd have two partitions: ext3 and swap), the file system.tar.gz is written in CD?

Boot from CD, mount your hdd, cd to it and issue tar xzpf /system.tar.gz (or where it resides). You still will have to chroot to your hdd afterwise and reinstall bootloader (don't know what Slack uses now).

Slackware still uses lilo, so you'd have to chroot and re-run lilo. If you've substituted grub, you'll have to do a similar thing for that. Be careful, if you are moving the drives around in a computer, your lilo/grub entries may change (hda1->hdb1 etc.)

I have watched man pages about chroot, but i did not understand what for is this command?

Or can someone explain with more detais all this procedure?
i am using LILO
please :)

Chroot is giving you a shell for which named directory is /. So all paths to configuration and libraries, usually hardcoded as absolute paths in programs, change to paths relative to given dir. For example, lilo will go to /boot for kernel - and it will be on hdd, not rescue cd.

It can't be simpler than: chroot = change root
That means, change the root partition (root = /) ;)

Specifically from the man page:

Want details? man chroot