Killing process

[Mark Dohojda]

Hello all :)

How can I kill a process from another virtual terminal (tty1 or tty2).
When I use command ps (or ps aux) I don't see any processes that were
(are) running on the tty0 terminal.  For example lets say that I am
running a program that crashed and froze my machine, but I can switch to
tty1 (via ALT-F2) what can I do to kill the process on the first
terminal?

Thank you 
Marek