Re: [gentoo-user] Gentoo SDcard updates tactics

[meino.cramer@gmx.de]

Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de> [14-10-07 17:23]:
> On Tue, Oct 07, 2014 at 05:29:11AM +0200, meino.cramer@gmx.de wrote:
> > Hi,
> > 
> > There are two SDcards of the same brand and model.
> > The first one cariies a not so current Gentoo Linux.
> > The second one is empty.
> > Now the first one is image-copied to the second one with dd,
> > which copies the contents of the whole device (not the partitions).
> > 
> > Then the first one is put into my embedded system, boots up and
> > the normal eix-syn/emerge/compiel is done to update the system (whch
> > takes a longer time becaus this is an embedded system).
> > 
> > Will I get a technical identical working and valid copy of the first sdcard onto
> > the second sdcard if I rsync the relevant partition of the first onto
> > the second sdcard.
> > 
> > Or will I produce crap this way? Is this valid Gentoo-wise?
> > 
> 
> Moin (again),
> 
> this will work quite well, at least if you take care (I used this way for
> moving my systems to new drives or even via network to different boxes (in the
> latter case CFLAGS and kernel config will become important again, as you can
> imagine)).
> Ideally you should run rsync with the option to remove files not found on the
> source drive (otherwise you'll likely clutter the target with stale files
> (especially documentation  but also older library versions).
> You will also need to change the configs (at least static network & hostname,
> possibly more) so that both systems don't clash, at least if you plan to run
> both on the same network.
> The "rm" option of rsync is potentially dangerous (e.g. you can delete files
> from home).
> If you are careful this is a valid way of doing that. Another option that would
> move quite a bit work from one machine to the other is just building binpkgs on
> one host and use the other one as binhost. That way (if you use identical
> /etc/portage dirs) you can quite savely use portage and nonetheless negate the
> use of compiling (there will still be the load of dependency resplution,
> extracting etc).
> 
> WKR
> Hinnerk

Moin Hinnerk, ;)

Good points...I have not thought deep enough about it - I think
(recursion?)...
Currently the "master card" is being updated via eix/emerge...and
then... :)

Best regards,
Meino