Pending further investigation, we now allege that Hanno Mueller wrote: > Hi, > > > probably a stupid question: How can I automate the re-assignment of my > laptop's IP address? > > > Linux runs just perfectly on my laptop, APM is fully supported, suspend to > disk works as expected, as does my PCMCIA network card. Thanks everyone. > > However, it's quite slow and and I move a lot between different networks > (home, university, office, places where I don't need the network card at > all). > > Using DHCP, at my new location I often do telinit 1 and back just to make > sure that all my applications know that the local ip address has changed. > > Is there any way to automate this, without telinit 1 ? (Maybe I just don't > quite get this.) > > > My ideal scenario would be waking up the laptop from suspend, inserting > the network card and somehow making sure that all applications running on > my laptop (e.g. apache, X, exim) get informed about the new network > adapter and / or the new IP address, while they continue to run. Similar > to this, I would want to remove the PCMCIA card just as easy. > > Basically, I don't want to do a real shutdown of my laptop at all, I just > want to use suspend to disk / wakeup; going from one office to another; > without leaving or restarting X to do so. > > > Links for further reading are appreciated. > >
You edit the network.opts under /etc/pcmcia to run arbitrary commands when the network card starts up by entering those commands under the start_fn() function. Use this to run a shell script or perl script to do whatever you need. In fact, I use it on my laptop to run a shell script that sets up appropriate ipchains rules, update my hosts file with my IP address and restart bind. You can do something similar for removing a card with stop_fn().
