No username for userid?

[Daniel Rosenzweig]

I just installed (using setup.exe) cygwin on an NT 4 machine....
The sh prompt tells me that I don't have a username --- when I do 
an 'id' I get a uid, but no name... when I try to rlogin (even with -l )it 
tells me that I don't have a username... I have a $USERNAME btw.
There is no /etc/passwd file... 

Any ideas how can I get a username! (Are there really 'logins' for 
Cygwin?)

Thanks. 
---------
Daniel Rosenzweig
danielzr@netzero.net
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