update FAI-installed system

[Steffen Grunewald]

Hi,

although re-installation in most cases might be suitable (and ensures that
all computers will get the same software versions as long as the mirror is
frozen), from time to time I have to do upgrades, in particular on 
solitary machines.
If I only call "apt-get update; apt-get upgrade" almost no questions would
be asked, and I'm afraid that configuration files that have been adjusted
by a FAI script/* would also be silently overwritten.
Is that true (or am I just paranoid)?
How can I avoid overwriting config files changed by me without asking?
How are others handling this situation?

Cheers,
 Steffen

-- 
Steffen Grunewald * * * Merlin cluster admin (http://pandora.aei.mpg.de)
Albert-Einstein-Institut (MPI Gravitationsphysik, http://www.aei.mpg.de)
       Science Park Golm, Am Mühlenberg 1, 14476 Potsdam, Germany
e-mail: steffen.grunewald(*)aei.mpg.de * +49-331-567-{fon:7233,fax:7298}