Lots of fun today !! Trying to track down the problem with ibmtr.c and the isa adapters I decided to update the kernel and driver on my machine at home 680 miles away. So a ssh'ing we go into the box, successfully upgraded the kernel, rebooted the machine, logged back in again.
Life is good, so we take the plunge and insmod the driver which immediately panics the kernel but luckily doesn't lock the box solid so we managed to reboot remotely again.
Then confidence got ahead of ourselves and decided to apt-get update/upgrade the box, which then proceeds to download 291 packages (140mb). No trouble so far. So we re-compile the kernel with kdb support, reboot the machine and try to log back in again.
Then we scream very loudly (and cause great mirth and merriment on #linux) as we realize that the update upgraded ssh and changed hosts.allow|deny and now we can't log into the machine. Tried various different methods to get back into the machine, not happening, no way, no how. So it will have to wait until I get back home tomorrow and can physically access machine.
I wonder if I can pipe kdb over a ssh connection though, hmmm.