If the system is responding to the keybaord you can hit (for example)
Alt-Ctrl-F2 to get a text console and then kill the offending process.

Otherwise if the box is on a LAN, telnet in from another machine and
do it.

-- Rod
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Sunset Systems                           Preconfigured Linux Computers
http://www.sunsetsystems.com/                      and Custom Software
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On Fri, 03 Nov 2000, Vaughn L. Treude wrote:
> David:
> Thanks for your answer.  I'm an old Unix guy, so I'm familiar with the
> "kill" command.  The problem is that, on the incident in quesiton, I
> couldn't get the cursor to behave to the point that I could start a terminal
> window.  I was hoping there was a hotkey to do this, or maybe I could set
> one up.   Or maybe there's some hotkey sequence to kill KDE, so I can
> restart it without rebooting the box.  I tend to prefer GUI's (because an
> old fart like myself has trouble remembering all the magic commands and
> options) but sometimes there's no substitute for the command line.
> (Maybe I just need to keep a terminal window open somewhere at all times,
> just in case?)
> 
> Vaughn