How to set xdm as default

[Terence Ng <ngterry2000@yahoo.com.hk>]

Hi!

How do I set xdm as default?  I have tried:
rcconf and select xdm     and
/etc/init.d/xdm start

but message shows:
Not starting X display manager (xdm); it is not the
default display manager.

I have viewed /etc/X11/default-display-manager
and it shows:
/etc/bin/gdm

but I do not know how to set, since there is no
/etc/bin/xdm such file.

What can I do?

Best regards,
Terence

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