Simplist way to boot only to a shell

I only want the PXES to bring up a shell enivironment, no special clients
or graphical interfaces.  Rather than tracing the logics of the init.d area
I thought I'd ask here...

What is the cleanest way to get PXES to boot only to a shell?

Is there a point in the rcS where is it safe to place an 'exit' and
arrive in a shell, or is there another way to approach this?

I don't need any services running on ths client, nor printer or sound
support.  I just need network and local hard drive support.


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