"can anyone refer me to some understandable writing or just to explain them?"
Here is an explanation of inittab:
http://publib16.boulder.ibm.com/pser...es/inittab.htm
The contents of inittab vary quite a bit from one distribution to another. What distribution are you using? Post your entire inittab and somebody who runs that distribution can probably explain the fields that you want to understand.
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Steve Stites