How to tell kernel to not bring up a network interface

   Thought I had the Sony Vaio working on both eth0 (static IP address) and
wlan0 (dynamic IP addresses), but not yet. I installed ifplugd and it works
if the ethernet cable is plugged in when the system boots. That is, it will
bring the interface down and up as the cable is removed and inserted. But,
it leaves eth0 up when the system boots without an inserted cable.

   Is there some place in a Slackware system where the kernel can be told to
not bring up eth0 if no cable is detected? John's script with ip show seemed
to do that, but it still did not allow wlan0 to come up if a wireless
network is dected by wicd.

Rich