More network setups

[Radim Gelner <radim.gelner@siemens.at>]

I'm moving from network to network quite often
and I carry my notebook with me. This leads to
the need of more network setups (IP addresses,
DNS, hostname, SMTP/POP server, etc).

I thought, I can solve this easilly by
introducing shell script, that will prompt me
for a configuration and according to this will
set up an environment variables (like $IP_ADDR)
that I will later use in all the Debian
configuration scripts instead of a real values.

Has anyone a different (better) approach, so
that I do not reinvent the wheel?

Thanks

Radim