Replace local linux OS with rsynced linux OS?

Jason Haar Jason.Haar at
Tue Dec 17 02:45:01 EST 2002

On Sat, Dec 14, 2002 at 12:41:51PM -0600, Dr. Poo wrote:
> Hi everyone, again. My question today is, how can i replace my development 
> boxs' local OS with a resynced version of the production OS (which currently 
> has it's home on the dev box)? 

I do it all the time! :-)

Obviously you'll probably need an exclude list as the IP address/hostname of
the dev box will differ (I assume) from your production box, but unlike
Windows, all files will go over fine. Just make sure you re-run lilo (if
that's your boot manager) after the rsync otherwise you won't be able to
reboot :-)

[BTW. exclude /proc]

> After the new OS is running, i'd like to be able to boot up and have the new 
> OS be mounted as root., but still then be able to mount the old dev box OS 
> and copy files from it that were being developed previously...then remove the 
> old dev OS all together. Make sense?
> I know this will require chroot, and changing fstab? and stuff like that.... 
> Has anyone done anything like this (or this exactly)? (A shell script 
> possibly? or a better mailing list to be asking this question on?)

Ahh - trust you to make it harder :-)

You can't chroot at boot time - doesn't really make any sense. All I can
think of is that your dev box will need more partitions that the production
box, and use lilo to choose between booting off the dev or the production


production box running 2.4.18 with /dev/hda1 as / and /dev/hda2 as swap

dev box running 2.4.20 with /dev/hdb1 as root and /dev/hdb2 as /

Then configure lilo to boot off /dev/hda1 for production (and therefore
/etc/fstab on /dev/hda1 refers to /dev/hda* partitions). When booting off
/dev/hdb1, the fstab in there refers to /dev/hdb* partitions.

Then when booted under dev, you can mount the production partition under
"/mnt" and rsync the live system onto it, etc.

...should work :-)

Jason Haar
Information Security Manager, Trimble Navigation Ltd.
Phone: +64 3 9635 377 Fax: +64 3 9635 417
PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1

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