did you try to type :
and the cause of this is because you are booting to runlevel 3 ...
if startx works, then you can edit you /etc/inittab to boot directly to the GUI
the line that says :
will have to be changed to :
that is, if this is the case ... you may not have X KDE or GNOME installed ...
but see if startx works, and we'll go from there