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What do you mean by "another"? tty1 should be the only one...
if you mean you run xdm/gdm and just want graphical login, you can disable tty1 the same way...
In case you get in trouble in future, to boot into single-user console mode use the 'single' kernel parameter in lilo/grub prompt
Let he/she admire the uncommensurable beauty of the smooth dark color on that screen... *he will probably panic and start pressing alt+ctrl+Fx until it will go back to screen 7, I suppose. Or *he will try to hack the system, but since *he's writing on a pipe to /dev/null, that would be difficult!
One interesting thing is tha if you have it installed (and that's quite easy), running "gdmflexiserver" from a shell box will open other graphic login shells (on screen 8-12) so many people can be logged at the same time. Enjoy it!
We are currently using SuSE Linux SE 8, and running XF86 version 4.0.2. And we are not able to disable the CTRL+ALT+F(1-6) keys. We do not want to allow our users to be able to get to any other Desktop sessions. Is there a way to disable this? We already tried to comment out the entries in /etc/inittab, it does not give us a blank screen, we are still able to log in and it messes up the colors once we return using CTRL+ALT+F7.
To my knowledge, there is no other way to stop desktop switching keys than to hack and rebuild the XF86 source, which I doubt you want to do.
As for the console tty, I'm not sure where it may be started besides inittab; however you can find it out this way: