On page 9, at "If we return to the lengthy netcat listing..." the command
being referenced is "netstat" NOT "netcat."

On pages 17, 18, and 224, replace instances of PSEXECSVC with PSEXESVC.

On page 261, replace "teh" with "the".

On page 303, at approximately line 12, "Now use i or your favorite editor
to enter..." should be changed to "Now use vi or your favorite editor to enter..."