[plug] Laptop internet connection

[Jeremy Malcolm]

Craig Dyke wrote:
> 
> Both computers happily see each other and can individually dial-up.
> 
> My question is can i set the laptop to dial-up when off my network and
> use PC dial-up
> when connected?
> If so, can i be pointed in right direction to enable this situation please?

Maybe something in /etc/rc.boot (Debian, deprecated but who cares) or
/etc/rc.d/rc.local (Red Hat) that says something like:

#!/bin/sh
if fping the.other.machine.on.my.network
then exit 0	# We are on the network.  Yay.
else pon	# Or ifup ppp0 for Red Hat
fi