On Tue, 31 Oct 2000, someone (possibly Michael Grundel) said:
//snip
Is there a way to prevent a user from "emulating" a login screen (especially for the console)?
If you enable the magic sysrq key, you can press Alt+SysRq+k to kill all processes running on the current console. Init will then start another instance of getty, and you can log in relatively safely. The sysrq key does other stuff too, which could be a problem (like the ability for anybody to crash the box in passing) -- you may want to hack the kernel sources.
Thanks, it works. I have also found the src-file and I may remove the other sysrq functions later.
Keyboards can be remapped.
Sigh, loadkeys... Ok, I have tried to remap "Alt" and the result is quite interesting: Ctrl-Alt-Del is no longer working, but Alt-Sysrq-k is still working! I have not tried alot, so there may still be a way to stop it. E.g. I did not try to remap Sysrq. Is it possible to restrict remapping (how?)? Is it possible to restore the original keyboard-map on logout?
&:-)
-Kurt
Thanks, Michael