cracking tool named 'nc' ?

[Matt Hunter]

Hi,

   I recently had my linux worstation broken into.  The cracker created 
a directory and placed two executables in it.  One was called 'zap' - 
which I've since found out is used to clean up log files before the 
cracker logs out.  The other one was called 'nc'.  I can't find any 
information on this program.  Does anyone out there know what it's used for?

Thanks :)

-Matt

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